When I was using needles all the time I had a HORRIBLE habbit of just saving them all and would be to broke (ya, like 4 bucks is too much to spend when you are doing that all the time) and just re-use them. BAD, know I don't have to say it but to you guys but NEVER do that anyone,it's the only reason I have scars from that.. but once I wised up I would never use it more than twice(still bad). Anyway, I would recap put back in plastic pack,cover plastic pack with tinfoil and toss em' out the window. Or just find a gas station garbage can recap and throw it in there. I mean, what else do you do with them besides throw away unless you have a needle exchange around you?