A:Answer Oster has a smoothie cup that uses the same blade assembly as the blender to allow you to blend your drink in the cup you drink it from. You add the ingredients, add the blade, blend it to your desired consistency, remove the cup and blade assembly, turn it so that blade side is up, and swap off the blade assembly for the drinking lid assembly. Replacement cups can be ordered from us at (800) 334-0759. Our hours of availability are from 9AM-6PM EST Monday-Friday. We are temporarily out of stock though on the smoothie cups, so we suggest you wait 4-6 weeks for stock replenishment.