Description Stainless Steel Insulated Spill-proof design ensures mess-free travel and hassle-free sipping. Includes a spill-proof 360° Sip Lid for convenient on-the-go drinking. Pure Taste ceramic-coated interior preserves the flavor of your beverages. Crafted from insulated stainless steel for long-lasting temperature retention. Slim design fits easily into bike cages and most cup holders