---
product_id: 404107118
title: "Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set)"
brand: "zak designs"
price: "4092 kr"
currency: ISK
in_stock: true
reviews_count: 8
url: https://www.desertcart.is/products/404107118-zak-designs-kelso-15-oz-tumbler-set-starpower-leak-proof
store_origin: IS
region: Iceland
---

# Leak-proof silicone valve straw Fits standard car cup holders 15 oz capacity - perfect hydration size Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set)

**Brand:** zak designs
**Price:** 4092 kr
**Availability:** ✅ In Stock

## Summary

> 💫 Sip smart, spill less, and stay hydrated in style!

## Quick Answers

- **What is this?** Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set) by zak designs
- **How much does it cost?** 4092 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/404107118-zak-designs-kelso-15-oz-tumbler-set-starpower-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

- • **Spill-Free Sipping:** Leak-proof valve straw keeps messes at bay, even on the move
- • **Travel-Ready Design:** Compact size fits car cup holders for hydration anywhere
- • **Eco-Friendly Upgrade:** Reusable tumblers that ditch disposable waste in style
- • **Kid-Approved Comfort:** Soft silicone straw designed for easy, gentle sipping
- • **Durable & Dishwasher Safe:** Sturdy plastic build that cleans up effortlessly

## Overview

The Zak Designs Kelso 15 oz Tumbler Set features two durable, reusable plastic tumblers with soft silicone straws equipped with leak-proof valves. Sized perfectly for kids, these dishwasher-safe cups fit standard car cup holders, making them ideal for home or travel. Designed to replace disposable cups, they combine convenience, comfort, and eco-consciousness in a fun, star-themed package.

## Description

Full description not available

## Features

- SIZE: The set contains two tumblers that are 3.16 inches in diameter and 6.67 inches tall. They each have a capacity of 15 ounces.
- MATERIAL: The durable tumblers are made of plastic with silicone straws. 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 cute 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 |
|---------------|-------|
| Brand | Zak Designs |
| Color | ‎Starpower |
| Special Feature | Leak Proof, Soft Straw |
| Style | Drinkware |
| Theme | Cartoon, Christmas, Easter, Stars, Travel |
| Recommended Uses For Product | Home, Travel |
| Included Components | Tumbler x 2 |
| Specific Uses For Product | Home, Travel |
| Shape | Round |
| Pattern | Star |
| Product Care Instructions | Dishwasher Safe, Hand Wash Only |
| Age Range (Description) | Kids 3+ |
| Material Feature | Lightweight |
| Cartoon Character | ‎Starpower |
| Reusability | Reusable |
| Unit Count | 1.0 Count |
| Item Weight | 5.6 ounces |
| Product Dimensions | 3.74"W x 6.89"H |
| Material Type Free | Lead Free |
| Number of Items | 1 |
| Customer Package Type | Standard Packaging |
| Is Dishwasher Safe | Yes |
| Finish Type | Glossy |
| Manufacturer | Zak Designs |
| UPC | 707849142976 |
| Global Trade Identification Number | 00707849142976 |
| Size | 15 Ounces |
| Item model number | 7070-U265 |
| Material Type | Plastic |
| Additional product features | Leak Proof, Soft Straw |
| Batteries required | No |

## Product Details

- **Brand:** Zak Designs
- **Material:** Plastic
- **Color:** ‎Starpower
- **Capacity:** 15 Fluid Ounces
- **Special Feature:** Leak Proof, Soft Straw

## Images

![Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set) - Image 1](https://m.media-amazon.com/images/I/71qrjjkyBdL.jpg)
![Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set) - Image 2](https://m.media-amazon.com/images/I/719dTaNKpiL.jpg)
![Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set) - Image 3](https://m.media-amazon.com/images/I/71u3wySg8IL.jpg)
![Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set) - Image 4](https://m.media-amazon.com/images/I/71XRr0aR15L.jpg)
![Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set) - Image 5](https://m.media-amazon.com/images/I/71pGHIPZcTL.jpg)

## Available Options

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

## 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

### ⭐⭐⭐⭐⭐ Cute and practical
*by J***S on June 3, 2025*

I very much like these cups. See through, so you can tell what's in them and how far gone it may be. They are heavier, so, my kiddos was less likely to hold it with their front teeth. It's been dropped so many times and it does scuff (it is plastic, after all). The patterns are fun, they like to twist it around and tell me who all the princesses are.In terms of seal...yes and no. Sometimes I have no issue, sometimes it'll be on its side and it'll leak. Nothing different about how I twisted it or if it's loose or not. It will pressurize, so, leave juice in it overnight and it'll start coming out the top.I like how much it holds. I feel like I'm filling it up less often than other sippy cups.

### ⭐⭐⭐⭐⭐ Tough, Toddler-Approved, and Super Cute!
*by D***4 on June 5, 2025*

My toddler loves these Zak cups! We have three of the regular plastic ones and one stainless steel, and they’re in heavy rotation at our house. The design is adorable, and the cups are genuinely leak-proof under normal use, I’d even say they’re nearly unbreakable. My little one has a habit of throwing them on the floor (on purpose!), and they still look brand new.That said, toddlers are resourceful if I’m not looking, he sometimes flips the cup upside down on his high chair tray and somehow gets a little water to leak out and make a mess. Still, compared to most toddler cups, these are by far the best we’ve tried.Highly recommend for durability, cuteness, and peace of mind!

### ⭐⭐⭐⭐⭐ Crash test approved 10/10
*by J***S on June 15, 2025*

Does your toddler have an arm? Might make it into the drafts next year? You might need this cup. Our almost 2 year old who likes to throw things as hard as he can, and often succeeds in testing the durability of all objects within his grasp- decided to hurl this over the side of the second story balcony, thus smashing his cup against the concrete by the pool below. This picture is after its journey to the beyond. It lives! Wondering what cup to get? This one is crash test approved. 🤘🏼

## Frequently Bought Together

- Zak Designs Kelso 15 oz Tumbler Set, (Starpower) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Cup Bundle for Kids (2pc Set)
- Zak Designs Kelso Toddler Cups For Travel or At Home, 15oz 2-Pack Durable Plastic Sippy Cups With Leak-Proof Design is Perfect For Kids (Sweet Berry, Lemon Zest)
- 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)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-08*