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, we made sure its straw cap (which comes included by the way) is ultra leak-resistant and both the bottle and cap are dishwasher safe. Plus, its engineered with a super strong, stainless steel armor that wont flinch through bumps and drops on account of slippery hands. Dishwasher safe because one less chore sounds nice. 18/8 stainless steel to withstand all dents and drops. Double-wall vacuum insulation keeps drinks ice cold. Dura coat color won't crack or peel. Bpa free so they can safely sip without a worry in the world. No sweat design keep their hands dry - critical when summiting the jungle gym.