Help fight the war on waste with the Swig Spill-Proof Reusable Coffee Cup. Swig is designed for great tasting coffee on the go. Simply rotate the integrated mouthpiece to effortlessly open or close the lid with one hand. The lid features a double leak-proof seal so it can be thrown in a bag without spilling. The lid offers an ergonomic drinking motion while its one-way valve allows air into the cup without letting liquid escape. Moreover, the thermal-insulated sleeve covers the cup’s entire body, making it comfortable to hold while keeping your drink hot. Thanks to its eco-friendly design, which comes in two sizes, this gadget saves disposable cup waste from landfill. The glass interior provides a premium coffee taste experience. The lid and sleeve are made of 100% food grade silicone rubber. Resistant to bacteria growth, Swig is hypoallergenic as well as microwave and dishwasher safe.