With its double-walled feature, the stainless steel water bottle keeps its contents at a steady temperature for up to 24 hours, and with a bit of pre-heating, you can be sure your hot drink will stay hot. A black plastic ring secures the silver twist-off cap that is outfitted with a silicone ring to ensure it seals tightly. The plastic ring easily doubles as a finger hook for carrying the bottle. The stainless steel water bottle holds a generous 34 fluid ounces of liquid.