If I take one or two ecstasy pills tonight, will I be able to be clean by friday?

That gives me ONE full day and night to clean my system. If i drink tons of water, green tea, take antioxidants. I even have these acai berry cleanse pills that rid of tons of toxic waste from your body. I might just even take ONE pill rather than two. I'm just wondering if you think I will be in the clear if I do this. And also , if I pee in a cup right before i take the drug and store it some place cool and sterile until the drug test do you think I'll be safe? Is it ok to store urine for a day?