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Zak Designs Kelso 15 oz Tumbler Set, (Underwater) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Bundle for Kids (2pc Set)

19.99

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Zak Designs Kelso 15 oz Tumbler Set, (Underwater) Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone, Perfect Bundle for Kids (2pc Set)

4.5

2K+ bought in past month

Highest ranking 101

13 comments

$19.99

Save 20%

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· 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. 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.

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Reviews From
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Taylor C.Reviewed in the United States on May 28, 2025

My favorite cups for my toddler. Super easy to clean with only a few parts. The gabby dollhouse design and bright colors are something my little one loves. Light weight to throw in a bag for outings and has a good seal that rarely spills. Good price for two really good cups. My toddler finds it easy to drink out of the cup with milk water or juice. I don’t recommend for thicker drinks like smoothies functions well with thin liquids.

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Amazon CustomerReviewed in the United States on June 1, 2025

Love these cups for my two year old! He loves spidey and these were the perfect cups. They are spill proof. We had a very mild leak from milk that was left at the top of the straw. I feel like we got a good price for two cups.

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StaceyReviewed in the United States on May 19, 2025

These are probably the best sippy cups I have bought for my toddler. I have about 5 of them and have not had one single leak. I will say that they do have to suck a little harder to get the liquid out. And since the straw is wider they will consume more faster but they get used to it pretty quickly. Do not sleep on the Zak Cups

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silverado98_nighthawk84Reviewed in the United States on May 21, 2025

These are extremely leak-proof in terms of tipping and dropping, but they leak as they warm up. If you put cold liquid in and let it warm up from ambient temperature, you'll eventually see water sitting on top of the lid. After time, it'll run down the side. I don't understand why this happens since it should be able to vent and equalize pressure. I call them micro-slits, but there may be another term for it. Either way, a micro-slit exists in the straw itself and on the lid in the rubber area next to the straw. This is how they made it leak-proof while still letting air in/out. Overall, we're very happy with these. Easy to assemble, disassemble, and clean. I like the large straw diameter for cleaning too. I'd give them a 4.5 out of 5.

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Amazon CustomerReviewed in the United States on May 1, 2025

These toddler cups have been a staple in our home, we mainly use them for milk, and they’ve worked out great. They’re the perfect size for little hands, super easy to clean, and have held up really well through daily use and countless dishwasher cycles. I also appreciate that they’re simple to assemble with no extra pieces to misplace. After heavy use, we’ve noticed a bit of leaking here and there, but it’s minimal and expected with the amount of wear they’ve had. Overall, they’re still our go-to cups and have made milk time much easier. Definitely a 5-star buy for any toddler household!

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Leah M.Reviewed in the United States on May 18, 2025

After this purchase, I’ve completely fallen in love with the Zak brand! These tumblers are not only super cute, but also functional and truly spill-proof—perfect for toddlers. I do recommend removing all parts when washing and hand washing the cups to help preserve the design, as it may wear off over time. Zak offers so many fun styles, and these cups really hold up well. Absolutely recommend!

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briannaReviewed in the United States on May 27, 2025

Love these leak proof sippy cups for my almost 2 year old daughter who likes to throw the cups when she’s done lol. Love the princess on them. Easy for my toddler to use. I like you get two for a reasonable price. Definitely recommend.

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Jarneshia BarberReviewed in the United States on May 18, 2025

Liked it however if your child is just learning to use straw type cups don't get these. My child would get frustrated and throw the cuz because he is used to tilting his other sippy cup upward,which caused this cup to crack. At first I thought the cup was leaking from the lid part but it kept leaking so after examination I saw that it cracked.im not blaming them because it didn't come cracked but like I said if your trying to get your child to drink from these without ever trying any other straw type cups with them then DO NOT GET THESE ,because if they get frustrated and throw it ,that's your money down the drain,I barely had this for a week😐.

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سارهReviewed in Saudi Arabia on May 23, 2025

حلوووووووه

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EleniReviewed in Canada on May 8, 2025

I've tried a few different sippy cups with straws for my son and these are great. He throws them on the ground a lot and they don't leak (mostly, nothing is 100%). I also really don't like a lot of the silicone options, we had one sippy cup that had his water tasting like soap it was gross. These are easy to clean and toss in the dishwasher.

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madhumati royReviewed in Canada on March 6, 2024

I recently purchased the Zak Designs Kelso 15 oz Tumbler Set in the Unicorn design, and I am absolutely delighted with this adorable and practical addition to our household. This non-BPA, leak-proof tumbler set has proven to be the ideal solution for keeping my little one hydrated with style and ease. Whimsical Design: The Unicorn design is an absolute hit with my child! The vibrant colors and charming unicorn illustrations add a touch of magic to every sip. It's not just a tumbler; it's a delightful accessory that sparks joy and imagination during snack time or on-the-go adventures. Durability and Quality: Crafted from durable plastic and silicone, these tumblers are built to withstand the energetic activities of kids. The materials used feel sturdy and reliable, and the overall construction ensures longevity. The screw-on lid provides a secure seal, preventing spills and leaks – a true lifesaver for parents of active little ones. Practical Features: The 15 oz size strikes the perfect balance, offering enough capacity for thirst-quenching without being too bulky for little hands. The inclusion of a straw makes sipping easy and mess-free, encouraging independence in young drinkers. The non-BPA materials bring peace of mind, knowing that my child's drinks are safe and free from harmful chemicals. Convenience in Cleaning: Cleaning these tumblers is a breeze. The simple design with minimal parts ensures quick disassembly, making it easy to thoroughly clean every nook and cranny. The practicality of these tumblers extends to the hassle-free maintenance, a bonus for busy parents. Great Value Bundle: The 2pc set in each pack provides fantastic value. Having two tumblers means there's always a clean one ready for use, whether at home, during outings, or packed in a lunchbox. It's a thoughtful touch that adds to the overall convenience of this set. In conclusion, the Zak Designs Kelso 15 oz Tumbler Set in the Unicorn design is a delightful and practical investment for parents seeking a reliable, stylish, and child-friendly solution for hydration. From its whimsical appearance to its durable construction and ease of use, this tumbler set has exceeded my expectations. It's not just a cup; it's a magical companion that makes every sip a joyous experience for my little one. Highly recommended!

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اميرهReviewed in Saudi Arabia on March 27, 2024

جميل جدا

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JaxsReviewed in Canada on March 20, 2025

These are so cute, but my 1 1/2 year old has a hard time drinking with these. I think this should be for 2 years old and up. I am keeping them as they are great quality and my little one will use them soon.