The Prepworks by Progressive set of 3 Icy Bottle Sticks are designed to easily slip into water bottles and bottled beverages, keeping drinks icy cold. The flexible design allows ice sticks to pop out of the trays quickly and easily. Each water bottle ice tray makes 10 long skinny ice sticks. Just pour water into the standard size ice trays and stack in the freezer. When the ice sticks are frozen, pop out a few sticks and drop them into your bottled beverage. Icy Bottle Sticks are perfect for sodas, bottled water, reusable beverage bottles and more. No more bloated frozen bottles or cracking ice to fit into your water bottle. BPA free and dishwasher safe.