This is a guess, i am feeding fro at the moment but to be fair would prob not be bothered to go downstairs and check anyway ;-) I'm sure of 1 corckscrew/bottle-opener, 1 tin-opener with bottle opener bit, pretty sure there is a rudimentary corkscrew that belongs with the picnic hamper, i think there is another bottle opener in the cutlery drawer and one on a big penknife. hmmn, thinking about it, big penknife may well have a corkscrew too? Also, not tried to count but I'm sure there are 'several'(anywhere from a couple to half-dozen or more?) small/cheap penknife things round the house most of which are likely to have a bottle-opener attachment, no idea how effective; i know skordh lost the one that was on his keyring when he forgot it was there while going through airport security...