Peterson 05 Shape: The Peterson Jekyll and Hyde 05 is a full bent briar with a fairly large, Dublin shaped bowl. The 05 fits the hand beautifully as the lipped top provides the perfect resting place for the index finger and thumb. (Rather like a Nonic Pint Glass) It has a fairly large bore and a good thick wall, which allows the smoker to get a good fill of tobacco, without the worry of overheating. If the above hasn't satisfied your appetite we ought to also point out the 05 has a more exaggerated curve than normal, which helps the system do its job more effectively.