Clear 16oz Shaker Bottle without lid 16 oz Ninja single-serve cup with the 4-tab locking design.“MAX FILL 16 oz / 400 mL,” It is likely compatible with models such as: * Ninja BL660 Professional Blender * Ninja BL770 Mega Kitchen System * Ninja BL780 * Some BL740/BL810-series models that use the same 4-tab cup system.