---
product_id: 96869375
title: "Thermosteel Flip Lid Flask 350, Double Walled Vacuum Insulated Thermos 350 ml | 12 oz | 24 Hours Hot and Cold Water Bottle with Cover, 18/8 Stainless Steel, BPA Free, Leak-Proof | Silver"
brand: "milton"
price: "$42.91"
currency: USD
in_stock: true
reviews_count: 13
category: "Milton"
url: https://www.desertcart.us/products/96869375-thermosteel-flip-lid-flask-350-double-walled-vacuum-insulated-thermos
store_origin: US
region: United States of America
---

# Leak-proof flip lid 24H hot retention 24H cold retention Thermosteel Flip Lid Flask 350, Double Walled Vacuum Insulated Thermos 350 ml | 12 oz | 24 Hours Hot and Cold Water Bottle with Cover, 18/8 Stainless Steel, BPA Free, Leak-Proof | Silver

**Brand:** milton
**Price:** $42.91
**Availability:** ✅ In Stock

## Summary

> 🔥 Sip smart, stay fresh—24 hours of perfect temperature, zero compromises! ❄️

## Quick Answers

- **What is this?** Thermosteel Flip Lid Flask 350, Double Walled Vacuum Insulated Thermos 350 ml | 12 oz | 24 Hours Hot and Cold Water Bottle with Cover, 18/8 Stainless Steel, BPA Free, Leak-Proof | Silver by milton
- **How much does it cost?** $42.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/96869375-thermosteel-flip-lid-flask-350-double-walled-vacuum-insulated-thermos)

## Best For

- milton enthusiasts

## Why This Product

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

## Key Features

- • **Mess-free confidence:** Leak-proof construction ensures zero drips in your bag—carry with peace of mind wherever you roam.
- • **One-hand convenience:** Flip lid design lets you sip effortlessly on the go—no twisting, no spills, just instant refreshment.
- • **Perfect 350 ml capacity:** Compact yet ample size fits your daily hydration needs without bulk, ideal for office, travel, or outdoor adventures.
- • **All-day temperature mastery:** Keeps drinks hot or cold for a full 24 hours with advanced double-wall vacuum insulation and inner copper coating.
- • **Durable, sleek & sustainable:** Crafted from premium 18/8 stainless steel, BPA-free and built to withstand your busiest days in style.

## Overview

The MILTON Thermosteel Flip Lid Flask 350 ml is a premium double-walled vacuum insulated thermos designed to keep beverages hot or cold for 24 hours. Featuring a leak-proof flip lid that doubles as a cup, durable 18/8 stainless steel construction, and a sleek silver finish, it offers professional-grade performance and convenience for busy millennials on the move.

## Description

Shop MILTON at the desertcart Travel & To-Go Drinkware store. Free Shipping on eligible items. Everyday low prices, save up to 50%.

Review: The BEST Thermos I've Ever Owned! - Milton Thermosteel is a Game Changer! - I'm absolutely blown away by the performance of this Milton Thermosteel bottle! I've tried countless thermoses over the years, and this one blows them all out of the water. The biggest thing for me is the outstanding heat retention. I'm a big coffee drinker and I love to take it with me on the go. Recently, I took this bottle on a long road trip. I filled it with piping hot coffee at 6 AM, and by 2 PM, it was STILL steaming and incredibly hot! I was amazed. No more lukewarm, disappointing coffee hours into my trip. This bottle kept my coffee at the perfect temperature for a ridiculously long time. It saved me so much money and hassle of stopping for refills! Beyond keeping my coffee hot for hours, I also appreciate: Durable Construction: The bottle feels incredibly sturdy and well-made. I'm confident it can handle the bumps and bruises of daily life and travel. Leak-Proof Design: No leaks! Even when tumbling around in my bag, I haven't experienced a single drop. Peace of mind is priceless! Easy to Clean: The wide mouth makes it easy to clean thoroughly, preventing any lingering smells or buildup. Sleek and Stylish: It's not just functional, it looks good too! The stainless steel design is modern and understated. Versatile: While I primarily use it for hot coffee, I can see myself using it for cold drinks in the summer as well! If you're looking for a thermos that can keep your beverages hot (or cold) for hours, is built to last, and is easy to use, look no further than the Milton Thermosteel bottle. It's an investment you won't regret! I highly recommend it. This bottle is a true game-changer!
Review: Works as expected - Great item. Keeps whatever I need chilled cold.

## Features

- ✅The included protective jacket may vary in color or design due to mixed inventory. All jackets are high-quality and provide the same insulation and protection.
- ✅ Despite its sizable presence, rest assured that the interior capacity perfectly aligns with the specified title and selected item. The size may seem larger due to it's robust double-wall vacuum insulation.
- ✅ To optimizse Hot & Cold performance precondition the flask with hot or cold water and fill to maximum capacity when using it. Avoid partial filling for maximum effectiveness & secure the lid tightly for keeping temperature locked in.
- ✅ 24-hour temperature retention - Milton Stainless Steel Bottle is designed with double-wall vacuum insulation and an inner copper coating. This unique design ensures that your beverages stay hot or cold for a full 24 hours, regardless of the ambient temperature. So, you can enjoy your favorite drinks at the perfect temperature all day long.
- ✅ Leak proof water bottle - This Metal Water Bottle has a leak-proof design that prevents any unwanted drips or messes. The best part about it is the flip lid that allows you to open and close the bottle with just one hand. No more twisting or unscrewing caps, just flip and sip! Additionally, the lid can be used as a cup, making it even more practical and convenient.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MS0D9S0 |
| Additional Features | Cold 24 Hours, Dishwasher Safe, Double Wall, Hot 24 Hours, Leakproof |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Base Diameter | 2.5 Inches |
| Best Sellers Rank | #1,939 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #68 in Insulated Bottles |
| Brand | MILTON |
| Brand Name | MILTON |
| Cap Type | Screw Cap |
| Capacity | 350 Milliliters |
| Color | Silver |
| Customer Reviews | 4.4 out of 5 stars 150,008 Reviews |
| Global Trade Identification Number | 08902061100595 |
| Included Components | 1 - Piece Flip Lid Water Bottle (350 ml) |
| Is Oven Safe | No |
| Is the item dishwasher safe? | No |
| Is the item microwaveable? | No |
| Item Dimensions W x H | 2"W x 9"H |
| Item Type Name | FLASK 350 |
| Item Weight | 134 Grams |
| Manufacturer | MILTON |
| Material Type | Stainless Steel |
| Model Name | FLASK 350 |
| Number of Items | 1 |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses For Product | Water, Tea, Outdoor, Coffee, Indoor, Camping |
| Special Feature | Cold 24 Hours, Dishwasher Safe, Double Wall , Hot 24 Hours, Leakproof |
| Theme | Food |
| UPC | 751827710121 |
| With Lid | Yes |

## Product Details

- **Brand:** MILTON
- **Capacity:** 350 Milliliters
- **Color:** Silver
- **Recommended Uses For Product:** Water, Tea, Outdoor, Coffee, Indoor, Camping
- **Special Feature:** Cold 24 Hours, Dishwasher Safe, Double Wall, Hot 24 Hours, Leakproof

## Images

![Thermosteel Flip Lid Flask 350, Double Walled Vacuum Insulated Thermos 350 ml | 12 oz | 24 Hours Hot and Cold Water Bottle with Cover, 18/8 Stainless Steel, BPA Free, Leak-Proof | Silver - Image 1](https://m.media-amazon.com/images/I/712OS9IxQ7L.jpg)

## Available Options

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

## Questions & Answers

**Q: What are the dimensions of the poster?**
A: 24x36"

**Q: does this thermos come with a separate case?**
A: Yes, it come with separate case.

**Q: Is Milton Thermosteel dishwasher safe?**
A: Not sure. But I have washed them in the top row of the dishwasher.

**Q: How do you keep liquids cold? I bought this to keep my infants milk cold while we are outside**
A: Rinse the Thermosteel flask with cold water and then fill the flask with cold milk/ liquids. It will stay cold for a while 😃

## Customer Reviews

### ⭐⭐⭐⭐⭐ The BEST Thermos I've Ever Owned! - Milton Thermosteel is a Game Changer!
*by M***K on June 10, 2025*

I'm absolutely blown away by the performance of this Milton Thermosteel bottle! I've tried countless thermoses over the years, and this one blows them all out of the water. The biggest thing for me is the outstanding heat retention. I'm a big coffee drinker and I love to take it with me on the go. Recently, I took this bottle on a long road trip. I filled it with piping hot coffee at 6 AM, and by 2 PM, it was STILL steaming and incredibly hot! I was amazed. No more lukewarm, disappointing coffee hours into my trip. This bottle kept my coffee at the perfect temperature for a ridiculously long time. It saved me so much money and hassle of stopping for refills! Beyond keeping my coffee hot for hours, I also appreciate: Durable Construction: The bottle feels incredibly sturdy and well-made. I'm confident it can handle the bumps and bruises of daily life and travel. Leak-Proof Design: No leaks! Even when tumbling around in my bag, I haven't experienced a single drop. Peace of mind is priceless! Easy to Clean: The wide mouth makes it easy to clean thoroughly, preventing any lingering smells or buildup. Sleek and Stylish: It's not just functional, it looks good too! The stainless steel design is modern and understated. Versatile: While I primarily use it for hot coffee, I can see myself using it for cold drinks in the summer as well! If you're looking for a thermos that can keep your beverages hot (or cold) for hours, is built to last, and is easy to use, look no further than the Milton Thermosteel bottle. It's an investment you won't regret! I highly recommend it. This bottle is a true game-changer!

### ⭐⭐⭐⭐⭐ Works as expected
*by K***. on June 12, 2026*

Great item. Keeps whatever I need chilled cold.

### ⭐⭐⭐⭐⭐ Worth the price
*by J***E on June 2, 2026*

This is my third bottle. These are the perfect size . Fits in lunch bag. Keeps water hot about 15 hours.

## Frequently Bought Together

- Milton Thermosteel Flip Lid Flask 350, Double Walled Vacuum Insulated Thermos 350 ml | 12 oz | 24 Hours Hot and Cold Water Bottle with Cover, 18/8 Stainless Steel, BPA Free, Leak-Proof | Silver
- Dr. Brown's Baby Formula Dispenser with Snap-On Lid for On-the-Go Feedings,Milk Powder Dispenser for Traveling with Infant,Gray

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/96869375-thermosteel-flip-lid-flask-350-double-walled-vacuum-insulated-thermos](https://www.desertcart.us/products/96869375-thermosteel-flip-lid-flask-350-double-walled-vacuum-insulated-thermos)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-04*