The Hydro Flask Ice Stick Tray makes ice cubes in a convenient stick form that"s easy to fit in any water bottle and store in any freezer. It"s made from flexible food grade silicone for easy removal and each tray produces eight 3" ice sticks. They"re easy to clean and dishwasher safe. Each Ice Stick Tray package comes with two trays and is backed by Hydro Flask"s lifetime warranty.