A glass mouthpiece is a great option to avoid waste. Not only does a RAW glass tip feel great on the lips, it's also reusable and has a couple of internal indents to stop herb material making its way down your throat. The RAW glass tip has an outer diameter of 6mm and is 34mm long.
It's a little bit long, and very narrow. Great for super skinny rolls, but overall, not the best. The turbo tip does look pretty good, though, and I'll definitely buy that if I see it for sale here.