Ninja Single Serve 16 ounce Cups. Include Two Replacement 16-Oz. Single Serve Cups and Two Sip Lids Ninja 16oz Cups with "FOUR TABS" Please make sure before buying that the cups you are replacing have "4 TABS". These cups fit these model number blenders. (The model number is located underneath the base of the blender and must start with a BL) : BL660 (1100 watt), BL663 (1100 watt), BL740, BL770 BL771 BL772 (1500 watt), BL780 (1200 watt), BL810 BL820 BL830 BPA Free Plastic Construction. Dishwasher Safe. Replacenent Cup For Nutri Ninja 16 oz Cup with Sip Seal Lid for BL660 BL660W BL740 BL770 BL810 BL820 Blender 2-Pack By NINJA PRO