Zak Designs Kelso Toddler Cups For Travel or At Home, 15oz 2-Pack Durable Plastic Sippy Cups With Leak-Proof Design is Perfect…
Zak Designs · 1 more pick →
Best for
Best overall
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 1 trusted source
Current price
$14.97
Updated Jun 27, 2026 · 1 min read
Sources behind this verdict
11 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Zak Designs Kelso plastic tumbler is the closest thing this category has to a consensus workhorse. High-trust r/toddlers threads repeatedly name it as their most-used and most-survived cup—one parent notes their child 'drops it at least 5+ times a day and they held up,' and another says they 'took a gamble' on a different brand and 'instantly regretted it.' That durability-plus-leak-resistance combination shows up again in verified-purchase reviews on Walmart and Target (Target rating 0.94), where the recurring theme is that the only leaks trace back to a misseated gasket or a chewed straw rather than a design flaw. The 15oz size and straw format make it more of a graduated toddler cup than a first transition cup, so reviewers don't recommend it as the very first step off a bottle.
What reviewers liked
- High-trust r/toddlers consensus on durability and drop survival
- Large verified-purchase base across Amazon, Walmart, and Target corroborating leak resistance
- Generous 15oz capacity and easy-to-clean design
- Fun licensed/character designs that reviewers say kids gravitate to
Where it falls short
- Plastic construction, not insulated, which low-plastic communities flag
- Reviewers note leaks occur if the gasket is seated wrong or the straw is chewed
- Too large/straw-based to serve as a true bottle-to-cup transition cup
- Straws can be chewed through by aggressive teethers
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Across the reviewers we read, the Zak Designs Kelso plastic tumbler is the closest thing this category has to a consensus workhorse. High-trust r/toddlers threads repeatedly name it as their most-used and most-survived cup—one parent notes their child 'drops it at least 5+ times a day and they held up,' and another says they 'took a gamble' on a different brand and 'instantly regretted it.' That durability-plus-leak-resistance combination shows up again in verified-purchase reviews on Walmart and Target (Target rating 0.94), where the recurring theme is that the only leaks trace back to a misseated gasket or a chewed straw rather than a design flaw.
The 15oz size and straw format make it more of a graduated toddler cup than a first transition cup, so reviewers don't recommend it as the very first step off a bottle. It's plastic rather than insulated, which low-plastic-focused communities like r/moderatelygranolamoms flag as a downside even while still praising the brand's stainless siblings. But for everyday at-home and travel use across a wide age range, the breadth and consistency of high-trust community support—not just the star average—is what earns it the top spot here.
- Size
- The set contains two Zak 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. They're dishwasher safe, can be disassembled for easy cleaning, 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 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.
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We like the zak cups. My LO drops it at least 5+ times a day and they held up. Only time it's leaked was when the rubber gasket wasn't correctly ...
Let's chat toddler straw cup recommendations! We prioritize: We personally love the stainless Zak Kelso tumblers, but always down to hear other ideas.
Trust tier reflects our editorial assessment of the source, not the individual quote. Hover for the rationale. See how we tier sources →
“Zak Designs Kelso Toddler Cups Review: Worth the Hype for Leak ...” · YouTube
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