Big enough for a full day on the river or trails, this fan-favorite bottle features a wide-mouth opening for fast, easy filling. Stainless steel construction won't retain or transfer flavors and is tough enough to take on any adventure. Double-wall TempShield insulation eliminates condensation and keeps beverages cold for up to 24 hours or hot for up to 12 hours. Honeycomb Insulation inside the twist-off cap provides additional temperature control.