Trueware Tuff Flask Double-wall polyurethane Insulated handy flask is designed to keep yours beverages hot/cold for long hours. Its stainless steel body on the inside and high grade plastic body outside (bpa free and fda certified) which makes it a highly utility and a spill proof flask. It has twisted top lid for storage compartment to keep tea bags sugar in cubes/ crystal form coffee medicines protein powder etc. Wide mouth to fill and clean easily. It is easy to carry with a strap. This Flask is perfect for on the go daily usage on buses trains etc and for gifting as well.