This award winning, high performance cooler keeps your drinks chilled for up to 6 hours without the need for ice. The cooler itself doesn't need to be chilled - it simply insulates the fridge cold bottle with double walls and vacuum insulation, slowing the thermal conduction process (i.e. it keeps it cooler for longer). One size fits most 750ml champagne, prosecco or sparkling wine bottles, but there is some room for adjustment if needed for taller bottles. Additionally, a compartment in the base holds a 'bubble-lock' - a detachable champagne stopper designed to keep bubbles bubbly!