CREATE LUXURIOUS FROZEN TREATS: Compatible with Ninja Creami Deluxe NC 501, NC 500 series ice cream maker perfectly. Simply mix your favorite frozen pint containers directly into the pints and seal with the leak-proof lids. Not only can ensure optimal performance, but also the best value for ice cream loving families. LEAK-PROOF LIDS: Our lids are tight enough to keep the ice cream containers sealed, no more leaks or spills. The lid can isolate other odors from the freezer, preserving the taste of your ice cream, yogurt, sorbet, or other frozen foods. 4 PINT CONTAINERS AND LIDS: Compatible with NC500 series Ninja Creami Deluxe ice cream makers. Having the extra 4 pint containers is very convenient. Because you can create more interesting and delicious frozen treats for your family or friends. REUSABLE & ECO-FRIENDLY: Both pints and lids are BPA-free and dishwasher safe for easy cleaning after multiple uses. They are shatterproof, can be reused to whip up all kinds of interesting frozen treats. NOTE: Compatible with Ninja Creami ice cream makers NC500 series. They do not work correctly with other blender models.