Zak Designs 15oz Bluey Kelso Tumbler Set Leak-Proof Screw-On Lid with Straw Made of Durable Plastic and Silicone

The cups themselves do a good job of not leaking for the most part but if they get dropped a lot the lid doesn’t quite line up properly so it will slightly leak. The cup also comes apart to make it easier to clean, you will need a little cleaning brush to clean the silicone straw that has a few spots that I’ve noticed start to grow mold but it’s easy to clean when a small straw cleaner brush. The cup is a great size for my toddler to hold and the cup itself hold a good amount of water. The paint/design does not hold up very well, I’ve hand washed as well as used the dishwasher and both cause the design to start coming off. Read more

Perfect sippy cups. Easy to use. Wash well. Colors are very cute. They don’t leak!!! Love the straws. Read more

Love the fun designs and characters Read more

I really like these cups because the cartoons are my son’s favorites. They are very practical for daily use, do not spill, and are safe for kids. The quality is very good and the design is both attractive and functional. I am very satisfied with the purchase from Zak Designs and I recommend them for families with children. Read more

We love the Zak Designs Kelso Tumbler Set! These cups don’t leak at all, and with our 3-year-old, we’ve never had any issues. They’re easy for little ones to use and have been fabulous overall. That said, our second child has shown a small design flaw: the rubber straw can be pulled out, which sometimes leads to spills in her car seat. Also, after about a year of dishwasher use, the designs start fading and peeling. Overall, these are still great cups and we’d recommend them—just wish the straw design and durability of the print were improved. Read more

My LO really likes this tumbler. No spills. Easy to drink from with the straw. I’m not worried about her stabbing her self in the mouth (such a strange fear I know). Design is great. Survives the dishwasher (a must for us) even if it’s starting to make the design fade. Easy to hand wash as well if needed. I will definitely get other designs of this in the future (because we all know how tastes change). Read more

My 2 year old toddler loves these cups. They are good quality, leakproof, and easy to clean. Definitely recommend for anyone with a toddler that's always on the move. Read more

If you’ve got a toddler who loves Spider-Man and you’re tired of dealing with messy spills, the Zak Designs Marvel Kelso Toddler Cups are an absolute win. These cups are not only adorable and kid-approved, but also incredibly practical for everyday use—whether at home or on the go. We found these to be our best option due to our super active toddler who will throw it from time to time. Previous cups would start leaking over time but not these cups. They have held up to the abuse and still look like they just came out of the package. ✅ A Parent’s Dream: 🧃 Truly Leak-Proof: We’ve tested a lot of sippy cups over the years, and these are some of the most reliably leak-proof options we’ve found. They don’t drip when tipped, tossed, or even dropped—which makes them ideal for travel, car rides, or playtime chaos. 🕸️ Marvel Design = Instant Hit: The Spidey and His Amazing Friends graphics are vibrant, fun, and a huge hit with any superhero-loving toddler. They love picking their own cup and showing it off to friends. 💪 Built to Last: Made from thick, durable plastic, these cups hold up to toddler drops, dishwasher runs, and heavy use. They don’t crack or fade, and the lids fit securely without being impossible to remove for adults. 🙌 Easy to Use & Clean: The simple design means no extra valves or hard-to-scrub parts. They’re top-rack dishwasher safe and super easy to take apart and reassemble. 🎒 Great for On-the-Go: At 15oz, they’re the perfect size for keeping kids hydrated without being too bulky. They fit well in cup holders and diaper bags. ⚠️ A Few Quick Notes: Not Spill-Proof When Lid Is Off: This seems obvious, but just a reminder—once the lid is off, it’s a regular open cup. But with the lid secured, you’re good to go. Handwashing the Graphics May Prolong Life: We’ve put ours in the dishwasher plenty of times with no issues, but if you want to preserve the bright Spidey designs long-term, occasional handwashing may help. ⭐ Final Rating: 5 / 5 These Zak Spider-Man sippy cups combine fun and function in the best way possible. They’re durable, leak-proof, easy to clean, and your kid will absolutely love drinking from them. A must-have for any toddler who wants to drink like a superhero! Read more