Designed with the commuter in mind, the portable tumbler is completely spill-safe and comes with stainless-steel straw. Cheeki’s thermal tumbler is double walled and insulated throughout to ensure maximal temperature retention. Easy to clean and dishwasher safe lid (top rack). Cheeki beverage tumblers are condensation free and car cup holder friendly. The straws anti-slip design stops straws from falling out of the tumbler when tilted.