The ThermoFlask 20 oz Insulated Food Jar 2-Pack features double-wall vacuum insulation (Temp-LockTM technology) to keep meals hot for 12 hours or cold for 24 hours. Crafted from durable, BPA-free 18/8 stainless steel with a powder coat finish, these 20 oz jars include a leak-proof lid, carry handle, and non-slip silicone base.