Package Includes – Flip top lids to go lid for Nutribullet blender cups replacement parts accessories - Two lids included Works Like the Original – Fits securely, snaps shut and seals tightly. Leak-resistant when used normally. Sturdy design, easy to clean, ideal for on-the-go smoothies and travel WARNING – Please Check Compatibility Carefully – Most returns are due to incorrect sizing. Customers often report the lids are “too big” when ordered for incompatible models Compatible Models – flip top lids to go replacement parts accessories Perfect fit for NutriBullet personal blender 600W & 900W Series cups (18oz, 24oz, 32oz) with 3.9" diameter threads and outside grooves (please see the product pictures for details) NOT Compatible With – 5" diameter NutriBullet RX Series cups, 3" diameter Magic Bullet cups, Baby Bullet cups, or cups with different thread designs. Doesn’t fit on the cup with the handle Use & Care Notice – Do not over-tighten or force the flip-top latch. Ensure the rubber seal is properly in place before use. Not intended for upside-down storage or heavy shaking Package Include: 2 Pcs Flip Top lids to Go Lid for Nutribullet Blender Cups Replacement Parts Accessories. Compatibility: Flip Top lids to Go Lid Blender Cup Replacement Parts Accessories - Compatible with NutriBullet Personal Blender 600 Watt Series and Compatible with NutriBullet Pro Personal Blender 900 Watt Series Cups. Works with 18, 24 and 32 oz Сups that measure 3.9 inches in diameter (please see the product pictures for details). Not Compatible with 5" diameter NutriBullet RX Series, Not Compatible with 3" diameter Magic Bullet Cups, Not Compatible with Baby Bullet Cups. Include seal ring gaskets pre-installed in the Lids for complete seal with No Leaking.