Rules of the Rubber,For condoms to be effective, you must remember to keep them handy, watch their expiry dates and put them on and take them off properly! Obviously, in the heat of the moment, it’s difficult to think with your head—well, the one above your waist at least. But in order to get the most bang for your buck, you should store your condoms securely: Yes, keeping one in your wallet is very responsible of you, but it’s not really advisable to store condoms in warm places or under pressure, so keep them in your bedside drawer instead, or in a cool, dry place well out of direct sunlight.