These printed bottle consists of natural high grade steel with a smooth surface hygenic and easy to clean.made from high quality 304 grade stainless steel.. If You're Heading Out To Spend A Day In The Sun Or Even If You're Going To The Office, This Stainless Steel desinger bottle Is The Perfect Product To Keep You Hydrated All Day Long. Stainless Steel Is Strong And Resistant To Corrosion And Rust Making It Ideal For Food Storage. This Sleek Flask Is Also Airtight And Leak-proof So That Your Liquids Stay Fresh For Longer Without Spilling All Over The Place. This Flask Is Well-insulated So You Can Keep Your Hot Beverages Hot And Your Cold Beverages Cold For Hours. This Sturdy Flask Made From Stainless Steel Is Tough And Hard-wearing And Is Sure To Last You For Many Years.