Thermos 24 Ounce Vacuum Insulated Hydration Bottle, Charcoal Thermos vacuum insulation technology for maximum temperature retention; Keeps cold for up to 18 hours Durable stainless steel interior and exterior; Silicone spout for comfortable drinking Hygienic rear push button lid with one-handed operation and locking switch Sweat-proof design won't leave water rings Lid features an integrated carrying loop; 24 ounce capacity