There was a posting by me few months back that kind of blasted Windmill for not being waterproof. I took a swim with it and it failed me. I think that waterproof lighter can be made if necessary. In the store you can buy one of those slim lighters that are shaped like a cigarettere. Smack that thing into one of those waterproof stainless steel capsules and you have yourself an underwater lighter. I think that such combo maybe taller than windmil but not as "fat". I think I give it a try. So far I shrink wrap my bic as an addition to my Windmil.
Matt