Borosil Thermo Stainless Steel Flask - Black 500 mlDescription Description Content Inner & Outer Material : 304 Grade 100% Rust Proof Stainless Steel Insulated Double Wall Vacuum With Copper Coating : Yes Colour : Silver Weight : 340 gms Capacity : 500 ml Colour : Black Rust Proof Steel : Yes Leak Proof : Yes Sipper Type Lid : Yes Freezer Safe : Yes Fridge Safe : Yes Dishwasher Safe : No Screw Type Cap That Doubles As A Cup Keeps Contents Cold & Water For 24 Hours Dimensions (LXBXH) : 71 mm x 71 mm x