Flip, Sip, Enjoy: Flip straw design with dust cover for clean and easy sipping. Leak-Proof and Spill-Resistant: Seals tightly when closed and resists spills when open. Vacuum Insulated Stainless Steel: Keeps drinks cold for hours without condensation. Durable and Easy to Carry: Features a soft carry handle and protective bumper base. Dishwasher Safe: Cap disassembles for quick and thorough cleaning.