Zak Designs Disney Kelso 12oz Insulated Toddler Tumbler - Leak-Proof

In this review of the Zak Designs Disney Kelso toddler tumbler, the bottom line is simple: parents who want a durable, leak-resistant transition cup that keeps drinks cold for hours will find it dependable. The 12oz size suits toddlers and young kids moving on from sippy cups, and the vacuum insulated stainless steel body combined with a soft silicone straw makes everyday use and travel easier. Cleaning is straightforward since the lid disassembles and most parts are top-rack dishwasher safe, though the tumbler body is best hand washed.

Key Features

• 12oz capacity: A practical size that holds enough liquid for toddlers without being bulky or hard to handle.
• 18/8 stainless steel: Food-grade construction gives the tumbler solid durability and a neutral taste for beverages.
• Vacuum insulation: Keeps drinks cold for up to 10 hours and prevents condensation on the outer wall.
• Leak-proof silicone straw: The built-in valve lets liquid flow when drinking and stops spills when tipped over.
• Disassemblable lid: The lid and straw come apart for easy cleaning and most parts are top-rack dishwasher safe.
• Travel friendly: Narrow enough to fit many car cup holders and designed for on-the-go use without messy leaks.

Who It's For

The Kelso tumbler is ideal for parents of toddlers who are transitioning away from traditional sippy cups but still need a spill-resistant option for daycare, travel, or everyday use. Its 12oz size and comfortable silicone straw suit young hands and mouths, while the vacuum insulation benefits kids who prefer cold drinks throughout the day.

Families who need a very small bottle for infants or who insist on microwaveable drinkware should look elsewhere, since the stainless steel construction is not microwave-safe and the cup is sized specifically for toddlers and small children rather than infants or older school-age kids.

Pros & Cons

Pros

• Strong, food-grade stainless steel construction that withstands tumbles and regular use.
• Effective vacuum insulation that keeps drinks cold for up to 10 hours without condensation.
• Soft, leak-proof silicone straw with a valve reduces accidental spills during travel.
• Lid disassembles for cleaning and many parts are top-rack dishwasher safe.

Cons

• Body should be hand washed rather than placed in the dishwasher, which adds a small care requirement.
• Not microwave-safe, so it is unsuitable for warming drinks in place.

Specifications

Our Verdict

The Zak Designs Disney Kelso 12oz insulated toddler tumbler is a sensible purchase for parents wanting a reliable, leak-resistant cup that keeps drinks cold and stands up to daily use. Its durable stainless steel build, comfortable silicone straw, and travel-ready leak protection make it good value for families transitioning from sippy cups while avoiding disposable options.

Frequently Asked Questions

Is the tumbler dishwasher safe?
The lid and straw are top-rack dishwasher safe and can be disassembled for cleaning, but the stainless steel tumbler body should be washed by hand.

How long does it keep drinks cold?
The vacuum insulated double-wall construction keeps drinks cold for up to 10 hours.

Will it leak in a bag?
The silicone straw spout includes a valve that prevents spills when the tumbler is tipped over, making it suitable for travel and carrying in bags.