Before I went on vacation last week, I decided to change my fuel filter. I just so happened to have one of those plastic combo cups handy from Taco Bell, and I thought, "Hey, what a great size to snake in and catch the canister's fuel!". I then proceeded to put the 1/3 full cup on the shelf in the garage, went on vacation, came home, opened the garage, and the cup was about 1/2 it's original size with the lower half being completely gone!
Word to the un-wise (probably no one but me), don't do this unless you want a mess of diesel in your garage!
Mark