Hydration for the little ones. We poured a (practically) bottomless amount of intuitive. drinker-friendly design details into this stainless steel sipper bottle for kids: Leakproof lid. no-look-sip indicator. built-in coaster. soft straw for effortless drinking…the list goes on (scroll down to see it all). It goes without saying (but we'll say it anyway) that'll you'll also get super long-lasting hot/cold retention. And at 12 ounces. this reusable kid's bottle is perfectly sized for small hands to easily hold.