@scottyc22, it's your call on the wood mouthpiece. Only you can decide if it's worth it to you. Personally, I think the VapCap looks so much better with the mouthpiece (that wood!
) and combined with the added functionality of being able to spin it, makes it worth the extra cash for me.
I'd suggest getting the fat mouthpiece. It's only a dollar, and it seals perfectly with a 14mm female joint, allowing you to use the VapCap with a bubbler. I also picked up one of these 14/18 adapters for my 18mm bubbler: