The 0.55 in. tiny round pebble ice drops easily into narrow-mouth water bottles and glasses, with no more big cubes blocking the sip, just smooth cold drinks every time. Pour water in once, close the lid to level the water, and freeze, with no tiny holes, no funnels, and no slow filling, perfect for daily use. Twist the tray to release mini ice balls fast. For best release, let it sit for 30 to 60 seconds after freezing, then twist for a clean drop into the storage bin. The small ice cube trays for freezer are made of upgraded sturdy material for long-term use, BPA-free and odor-free to keep your ice clean and fresh. This pack includes 2 trays plus a storage bin and scoop, allowing you to make and store more ice at once, great for iced coffee, cocktails, soda, juice, smoothies, and summer parties. The stackable design saves freezer space. Material: Plastic.