Want to keep your drink extra cool for days? Corkcicle Ice Sticks are just what you need. The BPA free silicone tray makes four 6" ice sticks that can be popped out individually. The elongated shape allows the ice stick to slip into any size from canteen 60oz, 25oz and 16oz canteens, and there's even a notch so it can be snapped in half to fit the 9oz canteen. Each tray comes with a reinforced lid to prevent freezer burn and allow for easy stacking of trays.