Last night we were at the apartment house, and Mike asked me to strip the paint and stain off the end pieces of the steps (they had to come off when we took out the spindles to take them to the stripper). He had bought some super-duper heavy duty stuff that he used on the steps to get off the paint the vandals had thrown(and it worked great), so I got that out and then looked for something to put the stripper in. I settled on 2 plastic disposable cups( I was going to have Pete help me - of course he had to go to the bathroom first- as he does whenever there is work to do). I poured stripper in one and when I dipped my brush the second time, the plastic of the cup was getting soft, so I put that cup into the other one. Before one minute was out (Pete was just out from the potty), I picked up the cup for another dip, and the bottom was eaten out of both cups!! WOW, that WAS strong. Needless to say, I was not letting Pete use that stuff! It did work well, and I got half of them done last night.