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Rambler® Jr. is a small-and-mighty kids bottle over-engineered for your little wild ones. This 12 oz. powerhouse inherited double-wall vacuum insulation from its Rambler® predecessors, carrying on the family legacy by locking in ice-cold water through backyard campouts and breaks between tag. As a well-deserved convenience for you, YETI made sure its Straw Cap (which comes included by the way) is leak resistant when closed and both the bottle and cap are dishwasher safe. Plus, it's engineered with a super-strong, stainless steel armour that won't flinch through bumps and drops on account of slippery hands.