Originally Posted by KCvale
High Density Polyethylene, HDPE, is the material of choice, it is what they make plastic gas cans and laundry detergent bottles with.
Complete non sequitur: drove to a laundromat on a near-empty tank a few years back. Used the last of my detergent, but had a couple bucks in change left. Almost bought a soda (but it was a good thing I didn't). Loaded van with clothes and made to go home. Van starts then sputters and dies. Tried again but knew what would happen and why.
Went back in laundromat to thoroughly
rinse Tide jug. Also made mental note to buy a friggin' gas can when I got paid. Made sure van was locked. Walked 1/2 mile to gas station. Got almost a gallon (those were the days). Tide jug held up fine. Put gas in van & drove home. Knowing just a little science has saved my sorry butt on more than one occasion. (It's also helped get me in trouble too, but I have this rug I sweep that under.)