Takeya ThermoFlask 2 Pack 40 oz Double-wall vacuum insulated stainless steel prevents outside temperature from affecting the inside and condensation from forming on the bottle 18/8 Stainless Steel - prevents rusting. Solid loop handle makes it easy to take your favorite beverage on the go. Easy to drink spout with leak proof lid. Wide opening for ice cubes. Cold for up to 24 hours; 12 hours hot.