I devour my Family Fun magazine when it comes in the mailbox. I stop what I'm doing and read it wherever I happen to be at that moment. When it came yesterday, I knew we'd be making these foamerators this week. You can see the article here at Family Fun. We only had two bottles for recycling as today was garbage pick-up. We had a big 2 litter soda bottle which didn't work very well. The small, sturdier water bottles worked best, the Gatorade bottles worked best. You may have to play around with a few different variations.