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The Zak Designs Kelso is a 15 oz kids' tumbler sold as a two-pack, with a screw-on lid and straw. It is BPA-free plastic with a silicone seal, and the lid is designed to be leak-proof. Each cup stands 6.67 inches tall and is 3.16 inches across, sized for small hands. The best new price is $13.99 at Target as of November 8, 2026, and it is the only new price listed.
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Lowest price we've seen: $13.99 on Nov 8 at Target. Tracked across 1 store since Nov 8.
Owners of the Kelso line generally report the lids hold up to being tossed in bags without leaking. Common complaints are worn or chewed straws and lids that stop sealing after heavy use.
