GUARDIAN 30 OZ AQUALOC is a drinkware designed for the everyday, easy to carry and two ways to sip. Our stainless steel two layer construction has an air vacuumed barrier that minimizes the transfer of heat, keeping drinks at their ideal temperature and the vessel sweat-free. Cold for up to 24 hours and hot for 6 hours. The pyro coated 304 Kitchen grade stainless steel construction is free of BPA & Phthalate, cup holder friendly and the vessel body is dishwasher safe. Highlights include snap release carry handle, silicone flip straw, button lock auto flip opening and watertight screw-top lid