The Funkin Screamin has a wide, medium flat rim that is rounded on the inside. It is a comfortable rim that is wide enough to offset lip swelling. There is a high alpha angle going into the cup, with no undercut for chop room. It’s going to feel like the .590″ inside diameter it is. The cup is shallow, but the entrance to the throat is very receptive for plenty of air flow and a nice big sound. Slotting is excellent. For those familiar with the Funkin Groovin, this model is very similar, but has a smaller inside diameter. This mouthpiece is well suited for “screamin’ high above the staff”!