I started out thinking of grommet tanks... bought some grommets and just do not like how they fit. My plan right now is to make some decorative replacement tanks for well known tanks already on the market, so I don't have to worry about caps. I'm going to start with the Davide, since I already have a bunch of those, and some carto tank replacements. I'm pretty excited, just waiting on the tubing.
Hmm, How hard would it be to do the design inside the tank? I love my Davide tanks, but I'm a little odd about "Bumpy" textures, I could live with less juice, haha, I'm an odd one I know.