Which condoms to use:
Really any condoms with square-ish wrappers will work. The plastic wrappers bend easier than the foil ones, but as you can see, the foil ones work too. If you're looking for red ones, both Durex and Lifestyles have red condoms that you can use. I would also suggest pink. For my bouquet I used Durex Love (red), Trojan Elexa (black and purple), Crown (silver) and Lifestyles Skyn (Gold).
Disclaimer - Because the condoms during this project get bent, its up to your own discretion on whether or not they are still usable. Bending the condoms may weaken them, making them more likely to break. It's really your call.
Step 1: Materials
1. 5 condoms still in their wrappers
2. 3 green pipe cleaners
3. Strips of green duct tape