I realize that this is an old thread, but seeing how I just purchased my iolite last week...
1) Lockable bowl. Even if it is just a J type latch that you swivel around or something. I've accidentally emptied out an entire bowl.
2) I don't have the metal tipped mouth piece yet, but I broke both my mouthpieces within 24 hours of buying it. So if the metal isn't durable enough, then a redesign of how the mouthpieces attach.
3) Black mouth piece tips. Using the white tip at a concert made me more uncomfortable than I would have been if it was black.
1) Lockable bowl. Even if it is just a J type latch that you swivel around or something. I've accidentally emptied out an entire bowl.
2) I don't have the metal tipped mouth piece yet, but I broke both my mouthpieces within 24 hours of buying it. So if the metal isn't durable enough, then a redesign of how the mouthpieces attach.
3) Black mouth piece tips. Using the white tip at a concert made me more uncomfortable than I would have been if it was black.