"Twist 'n Shot"* cups are designed to make it easier to remove Jello from a cup when making shots. A small lip of plastic rests inside, dislodging the gelatin when turned. You can get a twenty pack for $14 plus shipping, or buy in lots of 60 or 200. (Let's call those the "Frat Packs.")
* Does anyone else go bonkers when there is no trailing apostrophe on abbreviated "and"?