Insulated Bottle - 1 Liter Insulated Gray Black Bottle carrier features the bottle, an insulated nylon case cover, plus an attached shoulder strap available only in gray Insulated case cover keeps your beverages cold for up to 8 hours Will stay cold longer if you freeze the bottle and the liquid contents in advance Available in grey only. Holds 1 liter. Plastic Bottle does come with Insulator cover, however best used with own 1.L bottle. Contents will even stay cold during bikram yoga classes