lp gas or similarly pure butane gas volume expands to approximately 250 x its liquid volume varying of course by pressure temperature and gas chemistry or actual composition lp gas tank fill volume is typically to 80 85 % of capacity leaving vapor space in the tank
The good news is that six months after Laser Eye Surgery, you can, in most cases, wear coloured or cosmetic contact lenses. You will, however, need to see your optometrist before purchasing any coloured lenses as the shape of your eyes will have changed due to the surgery.
I wear disposable contacts as well, 2 week contacts. I usually wear them for a month though, and I wondered if it was damaging to my eyes. I asked my eye doctor about it, and she said that as long as I clean them every day they should be ok.