5 reusable ice cube sticks freezable water bottle cooling rods ( 5 sticks) ice cube sticks say goodbye to filling up messy, drippy ice cube trays! long, narrow ice sticks are designed to fit inside water bottles, reusable beverage containers, insulated lunch bags and more. no more watered down beverages, bloated frozen bottles or cracking ice to fit into your water bottle. quick and convenient, just grab and go! after use, simply wash cubes and refreeze. each stick measures 4.75 inches long and .75" diameter.