These bottles come with a silicone shield lid so your water never touches plastic and are leak proof. The insulated bottles use vacuum insulation, meaning they use no foam or fillers in their production. All parts of this bottle are recyclable at the end of its life, though these bottles are made to last a lifetime and come with a lifetime warranty. Insulated bottles stay cold for 36 hours and hot for 24 hours.
Materials: Silicone seals and handles, recyclable plastic and stainless steel lid, #304(18/8) stainless steel bottles in a cardboard box. No water touches plastic at any time