teke it back to tesco and say you had drank out of it before you realised, go off it and you will get some money or gift vouchers. the more you shout - the bigger the compo!! (i should know i work in a supermarket on the customer service desk!!) x
the cash only sits there for about 20 seconds then is sucked back into the machine. IF there was no one waiting to use the machine behind you the cash will have been sucked back into the machine and you can claim it back. I know this because I once went to a all night indoors cash machine and was so pissed when the money came out i could see four different lots of cash in front of me and every time i tried to grab it it was fresh air, after my third attemt it sucked in my cash and i was left stranded in town with my account showing as empty. funniest bit was the next day when i went to bank and they watched the video recording of me swaying about and shouting at the video camera
there is a chance it could have went back into the machine because i think if you leave it for 30secs its goes back in ,might be worthwhile asking in your bank
i found a hair bobble in my lasagne from stereo once, full meal and drink refund then vouchers to come again! winner complaining rocks.