Keep your beverages cold for up to 24 hours Inner Copper insulated liner All bottles have a glossy exterior Double walled vacuum insulation helps prevent condensation from hot or cold beverages Matching colored screw on Stainless Steel leak proof lid helps avoid spills and leaks Keep hot beverages hot and cold beverages cold longer Use for cold water, tea, coffee or your other favorite beverage Holds up to 500 ml. (17 oz.) BPA free and FDA compliant. Packaged in our ugly beautiful retail inspired packaging.