Don't forget to use only Non Lubricated. The lubricated ones have chemicals that will kill the flowers. The condom is to hold water around the stems. You first use the cotton batton rope, that the hairdressers use when doing perms, etc. Wrap the stems with it, across the bottom and around the stems. Then dip it in a bucket of water, squeeze out a bit, but still leave it very wet, then "slip" a condom over the cotton batton, so the water stays in. Tape tightly at the top at the binding point, with oasis waterproof tape, turn upside down to let any excess water drip out for 30 sec - 1 min, then wrap ribbon over the condom to hide it.
We are extremly small village, very rural, lots of farmers. Everyone loves them. The staff always knows when I get to that part of the wedding explanation, as everyone is laughing. I explain that we cover the cotton batton with a latex cover, and then a few minutes later explain the latex cover is a condom. The biggest laugh, is going to the local drugstore and ordering the condoms by the case and seeing the looks you get from people who know you in church, school, etc.etc. and the ones who don't have a clue who you are.