Do you hate when your favorite beverage loses its frosty (or piping hot) goodness before you can fully enjoy it. That’s why the folks at Yeti over-engineered their Rambler Tumblers with kitchen-grade 18/8 stainless steel and double-wall vacuum insulation. Rambler Tumblers keep ice 2X longer than plastic tumblers and are designed for maximum ice retention – and work just as well for hot beverages. Rambler Tumblers are BPA free, including the crystal clear lid, so you can gauge the level of your frosty beverage as it slides down the pipe.