Sage 30oz Era TumblerThe Era tumbler is designed to provide leakproof convenience, making it the perfect companion for on the go sipping. It comes with a fully leakproof lid that is suitable for cold and carbonated drinks, a ColdKey metal straw to reduce plastic waste, BevGuard technology for keeping ice intact for more than 24 hours, and a cup holder friendly base for a hassle free 30oz beverage experience on your daily adventures. Era Tumblers are 100% leakproof with