Funny (but relevent) anecdote:
AFOAF was overseas and bought a large amount of Red Smilies - 100 to be exact. After having one or two he shoved the rest in his pocket in aluminium foil and forgot about them. Later on, while peaking he saw a shiny object in the bottom of the pool and decided to investigate, only realising after he'd hauled himself back out of the pool - fully clad - that the pills were still in his pocket. The smilies were mush so he shaped them into a solid tennis-ball sized sphere of what looked like red Play-doh. He was later sighted on the beach, licking the ball, then once it dried out completely it crumbled into a dry powder, which he and co were able to rack up/ cap.
As with the toilet guy in the above post, the pill/ball of pills still worked perfectly. Not sure what effect the chlorine would have had though...