Yeti's Rambler, Klean Kanteen's Stainless Steel Tumbler and Deco's Stainless Steel Tumbler are all good insulated tumblers for both hot and cold beverages, according to Amazon.com, as of 2015. Hydro Flash's True Pint is also a good insulated tumbler, but it only works for cold beverages. All of these tumblers are BPA-free.
Yeti's Rambler tumbler, made of kitchen-grade stainless steel, features double-wall vacuum insulation; according to the manufacturer, it keeps ice two times longer than any plastic tumbler. It comes with a crystal clear lid that allows people to see its contents.
Klean Kanteen's durable Stainless Steel Tumbler, also vacuum-insulated, features a food-grade, electropolished interior that helps maintain the temperature of beverages and does not retain or impact flavors. Users only have to rinse it to prepare it for a new beverage.
Deco's Stainless Steel Tumbler features double-wall insulation and a durable, reusable stainless steel straw. It is completely dishwasher-safe, lead-free and environmentally friendly. This tumbler has a tight seal that prevents leaks and spills.
Hydro Flash's True Pint is a vacuum-insulated tumbler primarily designed to hold beer, though it works for other cold beverages as well. Hydro Flash engineered it to look and feel like a traditional pint glass.