BPA-free plastic; Durable Tritan Cup; Dishwasher Safe. Attach it to your Extractor Blade or Flat Milling Blade. Cup Dimensions: 5 inches (height) x 3.9 inches (diameter); Cup Capacity: 18 ounces; Package contains: 3 (three) 18 oz cup replacements; 3 (three) lip ring replacements. Please note: NOT COMPATIBLE with Nutri Ninja, NutriBullet RX, Magic Bullet or Baby Bullet blenders. Disclaimer: Not an OEM product. This is not a NutriBullet original product. This is a generic replacement part compatible with NutriBullet. Any use of the NutriBullet brand name, model or part designation for this product is made solely for purposes of demonstrating compatibility.