The tray is 3.8 inches long and narrow ice cubes that are designed to put in your water bottle, keeping it cold for a long time without having to freeze overnight.cylinder shape cavities can be used for ice cream, chocolates and other desserts and crafts. Stackable lids - each tray has a lid. stack better organize in your freezer, and protect against freezer odors. Stable and easy to release - bottom is special designed as groove shape to make it easy to release frozen contents, no leaks and no hassle! between two groove fillers are built for stability. Fda and LFGB approved 100 percent food grade silicone, bpa free, easy to clean, stores compact. Microwave, oven, freezer, dishwasher. Good for temperatures from -40 to 446 degrees fahrenheit. Each tray can make 10 stick cubes one time. The size of the tray is 24 x 11.5 x 3 cm. The size of each stick cube is 10 x 2 x 2 cm.