Unique Hollow Ice Cylinders:We launched the ice mold specially designed for 30oz and 40oz tumbler cups, and is also compatible with most other water cups. This mold can make 4 hollow ice cylinders, compared to traditional ice cubes , the cylinder shaped ice cubes can keep drinks melting slowly and diluting less, and you can enjoy the cold drinks for a long time. Better Size:Four ice cubes provide a variety of combinations for your tumbler cups or whiskey glasses, all four ice cubes can be fully stacked up in 30oz and 40oz tumbler cups, as well as for individual use in drinks, coffee, or cocktail glasses. Get one and DIY your favorite drinks, cola, juice, coffee with the creative ice cube mold for this summer! Food-Grade Silicone:We deeply know the importance of material safety to human health. Our ice mold is made of quality soft food grade silicone material. It's BPA free, odorless, no residue and dishwasher safe. It's flexible and elastic, and recyclable. Easy To Release The Cylinders:Simply fill water into the mold and place it in the freezer for a few hours. When it's time to enjoy your ice drinks, just squeeze and peel off the ice from the bottom to get 4 fresh ice cubes. It's durable, way better than those flimsy plastic trays and easier to clean and store. Perfect for making your favorite chilled drinks! Perfect Summer Gifts:Longer chilled drinks are perfect for parties, bars, restaurants, beach festivals and more events.