CITRUS SIPPERS a refreshing straw and ice-cube combo It's a tropical straw with a frozen twist! Fill the citrus slices with water (add a dash of lemon or lime for some extra zip) and freeze. Drop one into your Mai Tai and take a sip - feel those balmy beach breezes? Citrus Sippers are made from food-safe, freezer-safe, flexible synthetic rubber, packaged in clear recyclable, peggable boxes.