Color: Black; Material: Stainless Steel; Package Contents: 1-Piece 800ml Double walled Croma Thermosteel Flask. Bottle has inner copper coating which improves temperature retention has a high durability and light weight. It is portable and convenient to take with you to the office, house, park, picnic, and camping. Perfect for gifting. This reusable water bottle is composed of High Grade stainless steel, which is rust-proof, resilient, leak-proof, and unbreakable. Instruction for Vacuum Bottle: Fill the bottle completely for Longer heat retention, Do not use carbonated drinks. Pre condition flask with hot water before filling with hot water and with cold water before filling cold water for better heat retention. For any queries kindly reach customer care number as mentioned on the product packaging along with the proof of purchase.