LEAK-PROOF: Our patented slider lid creates an interior seal, ensuring 100% leak-proof and splash-resistant performance making it the ultimate commuter companion. STAYS HOT OR COLD: Vacuum insulated stainless steel keeps drinks cold up to 10 hours and hot up to 5 hours. EASY TO CLEAN: Lid is top rack dishwasher safe and handwash body recommended. All parts are BPA-free. CUPHOLDER FRIENDLY: Built-in cork composite coaster base protects surfaces and fits in cup holders with 2.9 inch base width. TRAVEL FRIENDLY: Our ergonomic cork composite built-in side handle not only adds a touch of style but also ensures a comfortable and secure grip for your on-the-go.