The 295ml Rambler Jr. Tumbler is a mini powerhouse. Designed to go as far as it's taken, this ultra-durable tumbler is made with puncture-resistant 18/8 stainless steel, which means it's always ready for rough-out-of-housing. Like all the rambler drinkware, this comes equipped with double-wall vacuum insulation, keeping drinks at ice-cold temperatures even when games of freeze tag go long. Plus, the splash-resistant straw lid comes with molded-in stopped to securely hold your kids's silicone straw in place.