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 a shallow V, and 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”!