Main Features: -v316 Stainless Steel Material – Resistant To Acid, Alkali And Corrosion – Ultra-Microwave Copper-Plated Tank – Enhance The Heat / Cold Preservation Effect – Vacuum Heat-Insulated Tank – High Vacuum, Long Preservation Time, Large Effective Volume – Spot-Spray Technique – Gives You The Comfortable Hand Feeling – 360 Degree Thick Imported Sealer – bpa-free, Non-Toxic, Prevent Water Leakage