This makes me wonder, “why didn’t I think of this?”
Get the ice cube maker and keep your plastic water bottles chilled for way longer than regular cubes.
Flexible Rubber Ice Tube Trays makes 5 1/4″ ice tubes that fit just about any bottle to keep favorite bottled beverages cool. Thin tube shape fits into bottled sports drinks, water and sodas without hassle. Trays flex and tubes pop out easily. Dishwasher safe. Set of three. Thermal plastic rubber,
Other interesting stuff at Zedomax.com: bottled beverages, cubes, dishwasher, flexible rubber, hassle, plastic water bottles, sodas, sports drinks, thin tube, tube shape, tubes