---
product_id: 410449600
title: "Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA)"
brand: "zak designs"
price: "$52.94"
currency: USD
in_stock: true
reviews_count: 13
category: "Zak Designs"
url: https://www.desertcart.us/products/410449600-zak-designs-shells-kelso-tumbler-set-leak-proof-screw-on
store_origin: US
region: United States of America
---

# Double-wall insulated steel tumbler BPA-free & reusable materials Leak-proof valve straw Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA)

**Brand:** zak designs
**Price:** $52.94
**Availability:** ✅ In Stock

## Summary

> 💧 Sip smart, spill less—hydrate like a pro with Shells Kelso!

## Quick Answers

- **What is this?** Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) by zak designs
- **How much does it cost?** $52.94 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/410449600-zak-designs-shells-kelso-tumbler-set-leak-proof-screw-on)

## Best For

- zak designs enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Chic Hydration:** Ditch disposables with this stylish, reusable set that blends durability and design for the modern family lifestyle.
- • **Effortless Clean-Up:** Dishwasher-safe lids and plastic tumbler save time, while stainless steel tumbler stays pristine with hand wash care.
- • **Kid-Approved Comfort:** Soft silicone straws designed for easy sipping and soothing teething, making the transition from sippy cups seamless.
- • **Spill-Proof Confidence:** Innovative silicone valve straw stops leaks even when tipped—perfect for busy kids and on-the-go parents.
- • **Dual-Material Versatility:** Includes both lightweight plastic (15oz) and insulated stainless steel (12oz) tumblers to suit every hydration need.

## Overview

The Shells Kelso Tumbler Set is a 3-piece BPA-free hydration bundle featuring a 15oz plastic tumbler, a 12oz double-wall insulated stainless steel tumbler, and an extra silicone straw with leak-proof valve. Designed for kids 3+, it combines durable, dishwasher-safe materials with spill-resistant technology, making it ideal for home or travel use while supporting eco-friendly, reusable drinkware habits.

## Description

This leak-proof tumbler set from Zak Designs makes hydration fun for kids! Durable Materials: The set includes two different tumblers, one made from plastic and one made with double-wall stainless steel; both are durable enough to use every day. The comfortable straws are made from silicone, and everything is completely BPA free. Leak-Proof Straw: The straw has a built-in valve that allows liquid to flow when drinking and prevents spills when the tumbler is tipped over. It's perfect for travel or for young children graduating from sippy cups. Hydrate Anywhere: Choose lightweight plastic or double-wall stainless steel, whichever suits the situation! The tumblers won't splash or leak, making them ideal to take on the go. At home, you don't have to worry about spills around papers or electronics, and drinks stay easily accessible through the straw. Specifications: 1 plastic tumbler (15 oz), 1 stainless steel tumbler (12 oz), 1 additional sipper and straw. Made of durable plastic, stainless steel, and silicone. BPA-Free - Zak is committed to safety. Lids and plastic tumbler are top rack dishwasher safe, hand wash stainless steel tumbler; do not microwave. Design: Shells.

Review: My FAVORITE sippy cup for transitioning my toddler! - I was in the market for some toddler cups since my little one needs to transition away from bottles. I bought a couple different types but these Zak cups are BY FAR my favorite! They were highly recommended by a lot of parents and specialists on TikTok. The price is fair for the quality of the materials. I got the set with a steel tumbler and a plastic cup so I could compare (and avoid plastic when possible). They are both high quality, super easy to wash, are dishwasher safe, and the designs are exactly as pictured. My daughter does really well with these, and the straw top is a soft silicone so she gets to teethe on it too. I usually don't add the plastic straw because my kiddo likes to tip the cup back like it's a bottle. These cups are pretty leak-proof! She can spill an occasional drop or two here and there but it's no different than how much she would spill with her bottle. The only thing that I can call a con is the fact that these don't have handles, which I think would make it easier for my kiddo to hold, but she manages fine without them for the most part. Also, the steel tumblers are heavy and could do some damage if dropped on a foot or flung into a wall (she's in a throwing stage) so we only use them with close supervision. If you are looking for a cup to transition your baby away from bottles, I would definitely recommend these! So far, these are my daughters (and my) favorite cup. I have already bought 2 more sets. Hope this helps!
Review: Great cup but not perfect - I loved our sons Contigo cup but after the lids shrunk from sterilizing them and then they started leaking, I decided to try these after they were recommended to me. I didn’t want to commit to 2 cups so my friend told me about this set where you get one plastic and one stainless steel. Haven’t used the stainless steel cup yet since my son is very much in the throwing phase but the plastic cup does the job. It’s very easy to use but I can imagine if it was the first straw cup your child was using that it could be a little difficult to drink out of. My son has thrown it multiple times off his high chair and minor scratches or nicks but I have noticed that sometimes after throwing it that the inside straw will disassemble from the outer straw. Easy fix though to just readjust it. It’s not fully leak proof although it was more so in the beginning than now. My son is in this phase where he will put the bottle upside down and smush the straw to the tray/table and water will leak out. He also throws it off the high chair even when attached to a bungee cord but when it’s upside down will also drip out. I do agree with other reviews where the design does wear off. We’ve been using this cup for a month and the design is already wearing off so be careful which design you choose since it might be more noticeable on certain ones. I still think it’s a good cup, easy to clean, and a good value for 2 cups especially one being stainless steel.

## Features

- MATERIAL: The durable tumblers are made of plastic and stainless steel with silicone straws. Long-lasting and BPA free, the lids and plastic tumbler are top rack dishwasher safe, while the stainless steel tumbler should be hand washed. Do not microwave.
- SIZE: The set contains two tumblers and one additional sipper and straw. The plastic tumbler has a capacity of 15 ounces and the double-wall stainless steel tumbler has a capacity of 12 ounces.
- LEAK-PROOF DESIGN: Each silicone straw has a built-in valve that allows liquid to flow when drinking and prevents accidental spills when the tumbler is tipped over. The straw is also soft and comfortable for kids to drink from.
- AT HOME OR ON THE GO: The straw tumblers are suited for travel, since they won't leak while keeping drinks easily accessible. They're also great for drinking beverages at home without worrying about spilling on papers or electronics.
- LIFESTYLE: Zak Designs drinkware makes hydration a fun part of your daily routine! These cute tumblers are great for kids just graduating from sippy cups. The tumblers are fully reusable--no more disposable cups--and you can choose the material that best suits the situation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09QCV12CD |
| Age Range Description | Kid 3+ |
| Best Sellers Rank | #4,436 in Baby ( See Top 100 in Baby ) #122 in Toddler Cups |
| Brand | Zak Designs |
| Brand Name | Zak Designs |
| Capacity | 15 fluid ounces |
| Color | Shells |
| Customer Package Type | FFP |
| Customer Reviews | 4.6 out of 5 stars 6,702 Reviews |
| Global Trade Identification Number | 00707849142662 |
| Included Components | 12oz Stainless Steel Tumbler X 1, 15oz PP Tumbler X 1, Additional Sipper X 1 |
| Item Dimensions W x H | 3.74"W x 6.89"H |
| Item Type Name | Bundle for Kids Includes Plastic and Stainless Steel Cups with Additional Sipper |
| Item Weight | 11.36 ounces |
| Manufacturer | Zak Designs |
| Manufacturer Part Number | 7088-W330-B |
| Material | Plastic, Silicone, Stainless Steel |
| Material Features | Food Safe, Insulated, Reusable |
| Material Type | Plastic, Silicone, Stainless Steel |
| Material Type Free | BPA Free |
| Model Number | 7088-W330-B |
| Number of Items | 3 |
| Occasion | Back To School, Birthday, Christmas, Easter, Thanksgiving |
| Other Special Features of the Product | Additional Straw, Insulated, Reusable, Splash-Proof, Vacuum Insulated |
| Pattern | Set |
| Product Care Instructions | Dishwasher Safe, Hand Wash Only |
| Product Style | Classic |
| Recommended Uses For Product | Home, Travel |
| Reusability | Reusable |
| Set Name | Kelso Tumbler Set |
| Shape | Round |
| Size | 3 Piece Set (Pack of 1) |
| Special Feature | Additional Straw, Insulated, Reusable, Splash-Proof, Vacuum Insulated |
| Specific Uses For Product | Cold Drinks, indoor, outdoor |
| Style | Classic |
| Subject Character | Shell |
| Theme | Conch, Fish, Jelly Fish, Shells, Underwater |
| UPC | 707849142662 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Zak Designs
- **Capacity:** 15 fluid ounces
- **Color:** Shells
- **Material:** Plastic, Silicone, Stainless Steel
- **Special Feature:** Additional Straw, Insulated, Reusable, Splash-Proof, Vacuum Insulated

## Images

![Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) - Image 1](https://m.media-amazon.com/images/I/71efOzQUYBL.jpg)
![Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) - Image 2](https://m.media-amazon.com/images/I/818HqfuSfJL.jpg)
![Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) - Image 3](https://m.media-amazon.com/images/I/811Ak4hNaBL.jpg)
![Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) - Image 4](https://m.media-amazon.com/images/I/71DnsLElc6L.jpg)
![Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) - Image 5](https://m.media-amazon.com/images/I/61r291QgNTL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: Is there a silicone boot that fits the stainless steal cup to prevent dings?**
A: We do not currently make these but are looking at adding in the near future.

**Q: Can i sterilize the plastic cup and its lid in the baby bottle sterilizer?**
A: We are not sure, we have not tested it for this.

**Q: Do you have to bite the straw to get get it to work? Or is it like a typical silicone straw?**
A: You can do it without biting but a little pressure will make a better flow.

**Q: Age group?**
A: These are for 3+.

## Customer Reviews

### ⭐⭐⭐⭐⭐ My FAVORITE sippy cup for transitioning my toddler!
*by L***E on August 4, 2024*

I was in the market for some toddler cups since my little one needs to transition away from bottles. I bought a couple different types but these Zak cups are BY FAR my favorite! They were highly recommended by a lot of parents and specialists on TikTok. The price is fair for the quality of the materials. I got the set with a steel tumbler and a plastic cup so I could compare (and avoid plastic when possible). They are both high quality, super easy to wash, are dishwasher safe, and the designs are exactly as pictured. My daughter does really well with these, and the straw top is a soft silicone so she gets to teethe on it too. I usually don't add the plastic straw because my kiddo likes to tip the cup back like it's a bottle. These cups are pretty leak-proof! She can spill an occasional drop or two here and there but it's no different than how much she would spill with her bottle. The only thing that I can call a con is the fact that these don't have handles, which I think would make it easier for my kiddo to hold, but she manages fine without them for the most part. Also, the steel tumblers are heavy and could do some damage if dropped on a foot or flung into a wall (she's in a throwing stage) so we only use them with close supervision. If you are looking for a cup to transition your baby away from bottles, I would definitely recommend these! So far, these are my daughters (and my) favorite cup. I have already bought 2 more sets. Hope this helps!

### ⭐⭐⭐⭐⭐ Great cup but not perfect
*by M***L on July 31, 2024*

I loved our sons Contigo cup but after the lids shrunk from sterilizing them and then they started leaking, I decided to try these after they were recommended to me. I didn’t want to commit to 2 cups so my friend told me about this set where you get one plastic and one stainless steel. Haven’t used the stainless steel cup yet since my son is very much in the throwing phase but the plastic cup does the job. It’s very easy to use but I can imagine if it was the first straw cup your child was using that it could be a little difficult to drink out of. My son has thrown it multiple times off his high chair and minor scratches or nicks but I have noticed that sometimes after throwing it that the inside straw will disassemble from the outer straw. Easy fix though to just readjust it. It’s not fully leak proof although it was more so in the beginning than now. My son is in this phase where he will put the bottle upside down and smush the straw to the tray/table and water will leak out. He also throws it off the high chair even when attached to a bungee cord but when it’s upside down will also drip out. I do agree with other reviews where the design does wear off. We’ve been using this cup for a month and the design is already wearing off so be careful which design you choose since it might be more noticeable on certain ones. I still think it’s a good cup, easy to clean, and a good value for 2 cups especially one being stainless steel.

### ⭐⭐⭐⭐⭐ Love these
*by B***S on July 19, 2026*

Had these for months now. They’ve held up from hand washing, top rack dishwasher cycles and being tossed around by a toddler. Only had a leak once but that was my fault for forgetting to put the seal ring in the lid. Also, my toddlers favorite cups.

## Frequently Bought Together

- Zak Designs Shells Kelso Tumbler Set, Leak-Proof Screw-On Lid with Straw, Bundle for Kids Includes Plastic and Stainless Steel Cups with Bonus Sipper (3pc Set, Non-BPA) 15 fl.oz.
- Zak Designs Kelso Tumbler Toddler Cup For Travel or At Home, 12oz Vacuum Insulated Stainless Steel Sippy Cup With Leak-Proof Design is Perfect For Kids (Happy Fruit)

---

## 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/410449600-zak-designs-shells-kelso-tumbler-set-leak-proof-screw-on](https://www.desertcart.us/products/410449600-zak-designs-shells-kelso-tumbler-set-leak-proof-screw-on)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-31*