---
product_id: 441512726
title: "Kelso 15 oz Tumbler Set, ( Underwater ) Non-BPA Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Baby Cup Bundle for Kids (2pc Set)"
brand: "zak designs"
price: "455 Lei"
currency: RON
in_stock: true
reviews_count: 5
category: "Zak Designs"
url: https://www.desertcart.ro/products/441512726-kelso-15-oz-tumbler-set-underwater-non-bpa-leak-proof
store_origin: RO
region: Romania
---

# 15 oz capacity per tumbler Leak-proof silicone valve straw BPA-free, dishwasher safe durable plastic Kelso 15 oz Tumbler Set, ( Underwater ) Non-BPA Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Baby Cup Bundle for Kids (2pc Set)

**Brand:** zak designs
**Price:** 455 Lei
**Availability:** ✅ In Stock

## Summary

> 🍼 Sip smart, spill less — hydration made hassle-free for your little trendsetter!

## Quick Answers

- **What is this?** Kelso 15 oz Tumbler Set, ( Underwater ) Non-BPA Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Baby Cup Bundle for Kids (2pc Set) by zak designs
- **How much does it cost?** 455 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/441512726-kelso-15-oz-tumbler-set-underwater-non-bpa-leak-proof)

## 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

- • **Kid-Perfect Size:** Compact 15 oz tumblers fit little hands and car cup holders effortlessly.
- • **Stylish Hydration:** Underwater-themed vibrant design makes drinking fun and encourages healthy habits.
- • **Safe & Sustainable:** BPA-free, reusable design keeps your child safe and reduces waste.
- • **Spill-Free Sipping:** Innovative valve straw stops leaks and messes, perfect for on-the-go parents.
- • **Effortless Cleaning:** Dishwasher safe materials mean no more scrubbing or lingering odors.

## Overview

The Zak Designs Kelso 15 oz Tumbler Set features two BPA-free, durable plastic tumblers with leak-proof silicone valve straws designed for toddlers transitioning from sippy cups. Each tumbler holds 15 ounces, fits car cup holders, and is dishwasher safe for easy cleaning. Its spill-resistant design and kid-friendly size make it ideal for both home and travel, while the playful underwater theme adds a fun, stylish touch to everyday hydration.

## Description

This leak-proof tumbler set from Zak Designs makes hydration fun for kids! Durable MaterialsThe tumbler is made from lightweight plastic, and the comfortable straw is made from silicone. Everything is completely BPA free and dishwasher safe.Leak-Proof StrawThe 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 AnywhereThe tumbler won't splash or leak and fits in car cup holders, making it ideal to take on the go. At home, you don't have to worry about spills or stains around fabrics or electronics, and drinks stay easily accessible through the straw.Spec. 2 tumblers with 15 oz capacity.Made of durable plastic and silicone.BPA-Free - Zak is committed to safety.Dishwasher safe, do not microwave.Length: 3.16-inch, Width: 3.16-inch, Height: 6.67-inch.Design: Underwater.

Review: Love these. Leak proof. Great starter cup for a baby getting into drinking from a straw. Easy to clean.
Review: I’ve actually purchased this tumbler set three separate times now because we love it that much. After going through so many different sippy cups for my 2-year-old, these are by far his favorite. The grip is perfect for little hands, and the ease of use is excellent — he can drink from them easily without spills or frustration. The drinkability is great, and the fit of the lid stays secure without being difficult to remove for cleaning. Speaking of cleaning, these are incredibly easy to wash and don’t trap odors or buildup like some other cups we’ve tried. The quality feels high, and the color/engraving designs are fun without wearing off over time. They’re sturdy, reliable, and genuinely some of the best toddler cups we’ve used. I really like them overall and will keep buying more whenever we need extras.

## Features

- SIZE: The set contains two tumblers that are 3.16 inches in diameter and 6.67 inches tall. They have a capacity of 15 ounces.
- MATERIAL: The durable tumblers are made of plastic with silicone straws. Long-lasting and BPA free, they're dishwasher safe and should not be microwaved.
- LEAK-PROOF DESIGN: The 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 tumbler is suited for travel, since it won't leak and fits in car cup holders while keeping drinks easily accessible. It's also great for drinking beverages at home without worrying about stains or nearby electronics.
- LIFESTYLE: Zak Designs drinkware makes hydration fun! These colorful tumblers are a great gift for kids just graduating from sippy cups. The tumblers are fully reusable--no more disposable cups--and a fun addition to the daily routine.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08XVT7JMR |
| Age Range (Description) | Baby |
| Brand | Zak Designs |
| Colour | Underwater |
| Country of Origin | USA |
| Global Trade Identification Number | 00707849124040 |
| Included Components | Lid, Straw |
| Is Dishwasher Safe | Yes |
| Item Weight | 159 g |
| Item model number | 6919-U265 |
| League | ncaa |
| Manufacturer | gearbubble |
| Material Feature | Insulated |
| Material Type Free | BPA Free |
| Net Quantity | 2.0 Count |
| Number of Items | 2 |
| Pattern | Cartoon |
| Product Care Instructions | Hand Wash Only, Machine Wash |
| Product Dimensions | 8W x 16.9H Centimeters |
| Recommended Uses For Product | Travel |
| Reusability | Reusable |
| Shape | Tumbler |
| Special Feature | Dishwasher Safe |
| Style | Modern |
| Theme | Baby |
| UPC | 707849124040 |

## Product Details

- **Brand:** Zak Designs
- **Capacity:** 15 Fluid Ounces
- **Colour:** Underwater
- **Included Components:** Lid, Straw
- **Material:** Plastic, Silicone
- **Recommended Uses For Product:** Travel
- **Shape:** Tumbler
- **Special Feature:** Dishwasher Safe
- **Style:** Modern
- **Theme:** Baby

## Images

![Kelso 15 oz Tumbler Set, ( Underwater ) Non-BPA Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Baby Cup Bundle for Kids (2pc Set) - Image 1](https://m.media-amazon.com/images/I/71XYywwLQQL.jpg)

## Questions & Answers

**Q: Does the Kelso prevent spills when the tumbler is tipped over?**
A: Yes, and you don't need to remember to close the lid! The Kelso tumbler has a valve in the spout, which lets water flow freely when kids are drinking, but stops spills if the tumbler is tipped over.

**Q: Is the tumbler easy to clean?**
A: Yes, both the spout on top of the lid and the inner straw underneath the lid are removable to make cleaning easy, and the parts are all dishwasher safe.

**Q: How old should my child be to use the Kelso tumbler?**
A: We recommend this tumbler for kids age 3 and up.

**Q: What kind of drinks can go in the Kelso tumbler?**
A: The Kelso tumbler is perfect for everyday cold beverages like water, milk, or juice. Thick smoothies are a little more difficult to drink with the valve, while carbonated drinks can build pressure and push liquid up through the straw.

**Q: Can I travel with the Kelso?**
A: The Kelso tumbler fits in most car and stroller cup holders for on the go convenience. We don't recommend putting the Kelso tumbler in a bag, as pressing on the soft spout can open the valve and allow drinks to flow out.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***T on 8 December 2025*

Love these. Leak proof. Great starter cup for a baby getting into drinking from a straw. Easy to clean.

### ⭐⭐⭐⭐⭐ Review
*by K***. on 7 December 2025*

I’ve actually purchased this tumbler set three separate times now because we love it that much. After going through so many different sippy cups for my 2-year-old, these are by far his favorite. The grip is perfect for little hands, and the ease of use is excellent — he can drink from them easily without spills or frustration. The drinkability is great, and the fit of the lid stays secure without being difficult to remove for cleaning. Speaking of cleaning, these are incredibly easy to wash and don’t trap odors or buildup like some other cups we’ve tried. The quality feels high, and the color/engraving designs are fun without wearing off over time. They’re sturdy, reliable, and genuinely some of the best toddler cups we’ve used. I really like them overall and will keep buying more whenever we need extras.

### ⭐⭐⭐⭐ Review
*by L***. on 12 December 2025*

These Zak Designs Kelso 15 ounce tumblers are bright, fun, and easy for kids to hold. The size is great for everyday use, the lids seal well, and they wash clean without staining. My toddler enjoyed using them and the prints looked just as good as the photos. The only issue is durability. One tumbler cracked after being dropped on the floor, which was disappointing for a product aimed at young children. They still function well and look nice, but they are not ideal for frequent drops.

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-05*