How do you get rid of used condoms, when flushing them is no option (did that at my friend's crib and lavatory broke).

Any other suggestions?

Does soap kill the little fuckers, so I can just pour some liquid soap into the rubbers and trow them in the garbage can?

Now that I think of it, imagine, if she tries to smear the seed into her box and notices, that it contains soap...

But I digress, I really need some suggestions, especially if she doesn't have fluid soap. Be creative!