Baltimore Orioles No Spill Straw Tumbler Boelter Straw Tumblers Ecofriendly straw tumbler comes with teamcolored top and rubberized sleeve. The 20 ounce tumblers are BPAfree and highly durable. Retractable straw folds carefully into place to allow for a no spill closure. Doublewall, insulated construction helps keep beverages cold, while rubberized sleeve provides solid grip and keeps hand warm when holding cold beverages.