---
product_id: 2429275
title: "monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black"
brand: "monbento"
price: "$27.41"
currency: USD
in_stock: false
reviews_count: 13
url: https://www.desertcart.us/products/2429275-monbento-large-bento-lunch-box-mb-square-onyx-with-2
store_origin: US
region: United States of America
---

# 57 oz total capacity Leakproof airtight silicone seals BPA-free durable PP plastic monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black

**Brand:** monbento
**Price:** $27.41
**Availability:** ❌ Out of Stock

## Summary

> 🍽️ Elevate your lunch game—because your meals deserve more than just a container.

## Quick Answers

- **What is this?** monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black by monbento
- **How much does it cost?** $27.41 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2429275-monbento-large-bento-lunch-box-mb-square-onyx-with-2)

## Best For

- monbento enthusiasts

## Why This Product

- Trusted monbento brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek French Design:** Minimalist black Onyx finish blends style with function, making your lunchbox a statement piece at work or picnic.
- • **Leakproof Confidence:** Silicone-sealed lids and elastic band keep your meals fresh and mess-free, so no more spills or stains in your bag.
- • **Spacious 57 oz Capacity:** Pack full meals with two roomy compartments plus a 10.5 oz sauce cup—perfect for power lunches on the go.
- • **Built to Last & Replaceable:** Durable BPA-free materials backed by a 3-year warranty and replaceable parts for sustainable everyday use.
- • **Microwave & Dishwasher Safe:** Heat and clean with ease—designed for busy professionals who demand convenience without compromise.

## Overview

The monbento MB Square Onyx is a premium, BPA-free, leakproof lunch box featuring two airtight compartments and a separate sauce cup, offering a generous 57 oz capacity. Designed with durable, microwave- and dishwasher-safe materials, it combines French minimalist style with practical convenience for professionals who demand both function and flair in their meal prep.

## Description

Product description Airtight The MB Square lunch box is completely airtight thanks to silicone seals on its intermediate lids, for a peaceful transport. Microwave-safe The MB Square lunch box is convenient. Simply lift the silicone caps from its intermediate lids to reheat its content in the microwave (500 W max - 3 min max). Dishwasher-safe The MB Square lunch box is easy to clean. Made of PBT, a high quality plastic, it is dishwasher-safe. Reusable Made of PP, a resistant and lasting plastic, the MB Square bento box was designed to be reused for many years. monbento invites everyone to take care of themselves, with high quality products that encourage to prepare tasty homemade meals, protect the environment with reusable products that limit the use of disposable containers, express themselves thanks to many colors and unique patterns.

Review: cute, multi-capacity bento box for work - I've had this bento box for over a year now. Overall, this bento box did exactly what I needed it to, including being cute and motivating me to make meals for myself for work. I came back to write this review because of how much I liked this bento box. Quick summary: * great size for two meals (or one) * never leaks * dishwasher/microwave safe * super cute. size/shape: Each of the two compartments can easily fit a meal. In fact it's usually not maxed out and I have more than enough food. It's nice sometimes when I just need 1 meal and it stacks, so I only need 1. So I can bring 2 meals to work or 1 meal and snacks (like fruit). A caveat is that this won't work for like, a salad or something that takes up a ton of space. For reference, i'm a 190lb human and lunch is often my biggest meal. Honestly the square shape is annoying to pack sometimes, but I also want to bring a lot of food so I don't believe there's a better solution here. On the other hand, it slides perfectly into a fridge. The "lid" doesn't actually do anything but look cute. I created a function though and I bought a camping spoon/fork (bc they're short) and they fit really well between the top compartment and the lid. leak-proof: It's never leaked. The compartments are sealed with the silicon lining and it's never come off unless I wanted it to. This does make it hard to open sometimes but I think the tradeoff is definitely worth it. Don't forget to open the air-vent when opening it (it releases the internal pressure and makes it easier to open). I've never put something as liquid as soup in it, but i've put in plenty of curry, salsa, and refried beans with no problems. strap: the strap holds everything together, which works, but it's not super secure. The silicon lining on each compartment is the thing making sure food doesn't come out. dishwasher/microwave: excellent. plastic will warp a tiny bit over time (think, years) and the compartments won't "click" into place anymore but it doesn't affect functionality.
Review: Defeating the tupperware gnomes. - I have long held the belief that I live with a band of stealthy gnomes who conspire to steal bits and pieces of my tupperware collection. Never leaving a matching lid or container. It is unknown to me whether their covert operations are for some odd business venture or some sort of twisted pleasure. My frustration with this situation comes to a head when I am preparing my daily lunches and I am unable to find containers that will appropriately store my lunch food and fit into my lunch box "soft cooler". ENTER; Monbento MB Square Bento box. With this outstanding creation I am able to thwart the efforts of the ninja like gnomes. This box fits perfectly into my lunch box "soft cooler" with a couple reusable ice blocks, and I can contain a nice sized lunch. I pack one compartment with a salad and use the split compartment for fruit and anything else that I want to keep separate. I eat large portions of protein so I have become accustomed to packing my protein in a separate sandwich bag and then using the top of the bento box as a plate to warm my protein in the microwave. I microwave the main compartments from time to time, but never with the lid on. I clean and dry the bento box at work and band it all together for storage in my lunch box "soft cooler". Either the gnomes have not thought to check my lunch box or they are unable to remove the elastic bands that hold the kit together, but my bento box has remained intact thus defeating the gnomes on this front. I would highly recommend this to anyone who is facing a similar foe, or to anyone who would like a well made self contained option for storing food.

## Features

- 🎖 FRENCH DESIGN AND QUALITY: the MB Square gray Coton bento box is BPA-free (in accordance with the regulations). It is made of PP, a very strong and resitant plastic
- 🍱 PRACTICAL & LEAKPROOF: the MB Square lunch box is a two-tier food container with a spacious 57,5 floz capacity (29 floz in each section) that is ideal for transporting a full packed meal. It is compact and lightweight for easily transporting your lunch on the go, whether you are heading to the office, gym, day out or family picnic!
- 👍 FOOD CUP INCLUDED: in addition to the two compartments, each with its own airtight lid, and elastic band holding them together, the MB Square black Onyx bento box for adults comes with a 10,5-floz food cup to keep your sauces, toppings or other sides separate from the rest of your meal.
- ✅ PRACTICAL & LEAKPROOF: the MB Square adult lunch box is microwave, dishwasher and freezer safe for extra convenience. Its intermediate lids are fitted with a silicone seal that ensures this bento box is airtight, putting an end to dressings spilling into bags and over clothing.
- 🎁 SUCCESSFUL GIFT: monbento lunch containers are guaranteed for three years! Pink lovers will love using and taking these bento box containers everywhere they go!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00GRZINNS |
| Best Sellers Rank | #126,216 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #1,500 in Lunch Boxes |
| Brand | monbento |
| Brand Name | monbento |
| Capacity | 1.7 Liters |
| Closure Type | Clip-On |
| Color | Black Onyx |
| Container Shape | Square |
| Customer Reviews | 4.6 out of 5 stars 2,918 Reviews |
| Global Trade Identification Number | 03760192681933 |
| Is the item dishwasher safe? | Yes |
| Is the item microwaveable? | Yes |
| Item Dimensions L x W x H | 5.5"L x 5.5"W x 5.5"H |
| Item Form | Airtight container with silicone seal |
| Item Volume | 57 Fluid Ounces |
| Item Weight | 1.1 Pounds |
| Manufacturer | monbento |
| Material | Plastic |
| Material Feature | BPA Free, Dishwasher Safe, Microwave Safe, Freezer Safe |
| Material Features | BPA Free, Dishwasher Safe, Microwave Safe, Freezer Safe |
| Material Type | Plastic |
| Material Type Free | BPA Free |
| Other Special Features of the Product | Odor Resistant, Portable |
| Package Quantity | 1 |
| Product Care Instructions | Dishwasher Safe |
| Product Dimensions | 5.5"L x 5.5"W x 5.5"H |
| Recommended Uses For Product | Office, Picnic |
| Size | One Size |
| UPC | 791769439254 798256072642 791358543539 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** monbento
- **Capacity:** 1.7 Liters
- **Color:** Black Onyx
- **Material:** Plastic
- **Material Feature:** BPA Free, Dishwasher Safe, Microwave Safe, Freezer Safe

## Images

![monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black - Image 1](https://m.media-amazon.com/images/I/61JxdLis6NL.jpg)
![monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black - Image 2](https://m.media-amazon.com/images/I/61+-7XhiDVL.jpg)
![monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black - Image 3](https://m.media-amazon.com/images/I/61JB5-mjnUL.jpg)
![monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black - Image 4](https://m.media-amazon.com/images/I/718lgcNzB6L.jpg)
![monbento - Large Bento Lunch Box MB Square Onyx with 2 Compartments - 57 oz - Leakproof Lunch Box for Work/Picnic/Meal Prep - BPA Free - Microwave & Dishwasher Safe - Black - Image 5](https://m.media-amazon.com/images/I/71CFVSZm3lL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Is this an insulated bento box?**
A: No, this set is not insulated.

**Q: Does it leak liquids from food**
A: I have been using it a lot since I bought it and have not seen any liquids leak, even when I put soup in it.

**Q: Does the inner dish seal up tight to the lid so that if I put cut up strawberries in one side and apples in the other they will not co-mingle juices?**
A: With the snall addition that comes with it. It is a completely separate compartment so the juices would not co mingle at all.

**Q: How do you carry this lunch box, as it doesn't appear to have a handle?**
A: Dear, you can carry it on our MB Pochette or MB Ezy (insulated) :-) You can discover those products on amazon monbento shop

## Customer Reviews

### ⭐⭐⭐⭐⭐ cute, multi-capacity bento box for work
*by L***L on September 13, 2024*

I've had this bento box for over a year now. Overall, this bento box did exactly what I needed it to, including being cute and motivating me to make meals for myself for work. I came back to write this review because of how much I liked this bento box. Quick summary: * great size for two meals (or one) * never leaks * dishwasher/microwave safe * super cute. size/shape: Each of the two compartments can easily fit a meal. In fact it's usually not maxed out and I have more than enough food. It's nice sometimes when I just need 1 meal and it stacks, so I only need 1. So I can bring 2 meals to work or 1 meal and snacks (like fruit). A caveat is that this won't work for like, a salad or something that takes up a ton of space. For reference, i'm a 190lb human and lunch is often my biggest meal. Honestly the square shape is annoying to pack sometimes, but I also want to bring a lot of food so I don't believe there's a better solution here. On the other hand, it slides perfectly into a fridge. The "lid" doesn't actually do anything but look cute. I created a function though and I bought a camping spoon/fork (bc they're short) and they fit really well between the top compartment and the lid. leak-proof: It's never leaked. The compartments are sealed with the silicon lining and it's never come off unless I wanted it to. This does make it hard to open sometimes but I think the tradeoff is definitely worth it. Don't forget to open the air-vent when opening it (it releases the internal pressure and makes it easier to open). I've never put something as liquid as soup in it, but i've put in plenty of curry, salsa, and refried beans with no problems. strap: the strap holds everything together, which works, but it's not super secure. The silicon lining on each compartment is the thing making sure food doesn't come out. dishwasher/microwave: excellent. plastic will warp a tiny bit over time (think, years) and the compartments won't "click" into place anymore but it doesn't affect functionality.

### ⭐⭐⭐⭐⭐ Defeating the tupperware gnomes.
*by M***W on July 31, 2017*

I have long held the belief that I live with a band of stealthy gnomes who conspire to steal bits and pieces of my tupperware collection. Never leaving a matching lid or container. It is unknown to me whether their covert operations are for some odd business venture or some sort of twisted pleasure. My frustration with this situation comes to a head when I am preparing my daily lunches and I am unable to find containers that will appropriately store my lunch food and fit into my lunch box "soft cooler". ENTER; Monbento MB Square Bento box. With this outstanding creation I am able to thwart the efforts of the ninja like gnomes. This box fits perfectly into my lunch box "soft cooler" with a couple reusable ice blocks, and I can contain a nice sized lunch. I pack one compartment with a salad and use the split compartment for fruit and anything else that I want to keep separate. I eat large portions of protein so I have become accustomed to packing my protein in a separate sandwich bag and then using the top of the bento box as a plate to warm my protein in the microwave. I microwave the main compartments from time to time, but never with the lid on. I clean and dry the bento box at work and band it all together for storage in my lunch box "soft cooler". Either the gnomes have not thought to check my lunch box or they are unable to remove the elastic bands that hold the kit together, but my bento box has remained intact thus defeating the gnomes on this front. I would highly recommend this to anyone who is facing a similar foe, or to anyone who would like a well made self contained option for storing food.

### ⭐⭐⭐⭐⭐ Size matters
*by J***N on December 31, 2025*

I reviewed a lot of the wooden base Bento boxes and I do very much like them but they are all very small with this product it has a way of condensing space while still having the most room for food for people on the American diet. The biggest reason I chose a Bento product over regular sealed containers for lunch boxes is because of how much I hate the lids and how you have to clean them there's so many crevices more food gets in and gels up I hate that about all of them this product is very simple in the way that it doesn't utilize a seal snap feature just an airtight seal press feature.

## Frequently Bought Together

- monbento - Large Bento Box MB Square Onyx with Compartments - Leakproof Lunch Box for Work or Meal Prep - BPA Free - Food Grade Safe - Black
- monbento - Lunch Bag MB Pochette L Natural Onyx - Polyester and Cotton Large Lunch Tote - For Work Lunch Packing - Can Contain a Bento Box + a Bottle + a Cutlery Set - Cream & Black
- MONBENTO - Cutlery Set MB Slim Box Onyx for Lunch Box - 3 Pieces Fork Knife Spoon - Flatware Set Work Lunch Packing - Suitable for MB Original & MB Square Bento Boxes - Stainless Steel - Black

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-22*