Brmate New Era 30oz Blue Agave Tumbler DWER30BAV eBay New Brumate Era 40oz Tumbler Blue Agave DWER40BAV (Please Read) eBay BrMate Era 30 oz Tumbler with Handle and Straw 100% Leakproof Amazon.com: BrMate Era 40 oz Tumbler with Handle and Straw 100%. The Era tumbler is completely leakproof, perfect for hassle free sips while on the move. Its fully sealed lid is designed for both cold and carbonated drinks, a ColdKey stainless steel straw helps reduce plastic waste in your water, BevGuard technology keeps ice cold for over 24 hours, and a cup holder friendly base allows you to enjoy 40oz of your preferred beverage without any leaks or spills on your daily adventures. Era Tumblers are 100% leakproof with cold beverages and carbonated beverages with ice when in the locked position. Not recommended for use with hot beverages.