Stainless steel double walled and vacuum insulated construction. Double walled construction prevents condensation. Adjustable top screws up and down to fit most bottle sizes. Lightweight and easy to carry so you can enjoy your drink anywhere you go. Beautiful champagne flutes are great for sipping or toasting. Glass lining ensures no metallic taste or smell. Comes with sip through lid for easy enjoyment. Tumbler holds 6oz of champagne. Removable glass lining is dishwasher safe. Hand wash stainless steel exterior.