These Water Bottle Ice Trays by Casabella produce long, thin ice cubes that will slide easily right into your sport bottle or store-bought water bottle. Use them for bottles sodas and juices too! The silicone ice cube trays come in a set of two, so you can always have ice to cool your bottled beverage. The colorful trays are dishwasher safe and feature no-spill reservoirs. Assembly level/degree of difficulty: Easy.