Specifically designed for 40 Oz tumblers, our ice cube tray makes large, hollow ice cubes that fit perfectly, keeping drinks colder for longer.Crafted from safe, flexible silicone for easy use.Includes a lid to prevent spills and maintain the freshness of your ice cubes by blocking out freezer odors.Flexible silicone allows for effortless ice cube removal without any hassle.Stackable tray design saves space in your freezer and keeps it organized.Suitable for various drinks like water, juice, cocktails, and iced coffee.Large ice cubes melt slowly, ensuring your drinks stay cold longer without becoming diluted.The design of the mold is unique and has multiple independent grids. It can make three cylindrical large, medium and small ice cubes at a time to meet your various needs.