Where can I find extra long straws?

My brother and I are planning a margarita pool party like the one on the Drew Carey show. This consists of a kiddy pool filled with margarita and people sitting around the pool with long straws drinking from it. Sanitary? No. Fun? Hell yes. The problem is, I need to find someplace I can find straws that are at least three feet in length. Longer would be better. Please help me make this party a success!