The 10 oz. YETI Rambler Jr. Tumbler is a mini powerhouse. Designed to go as far as its taken, this ultradurable tumbler is made with puncture resistant stainless steel, which means its always ready for rough out of housing. Like all of YETIs Rambler Drinkware, this thing comes equipped with doublewall vacuum insulation, keeping drinks at ice cold temperatures even when games of freeze tag go long. Plus, YETIs splash resistant YETI Rambler Straw Lid comes with a molded in stopper to securely hold your kids silicone straw in place, letting you rest assured that what theyre sipping stays in their cup and off their shirt. Note for ages 3 and older. Do not use the Rambler Silicone Straw Lid with hot, carbonated, or pulpy beverages or for storage of food or perishables.