Water challenge. If you are trying to lose weight, drink lots of water. It also speeds up your metabolism rate!

Also, it is recommended that you should drink AT LEAST 8-10 glasses of water a day. 10-8oz glasses of water is 80 oz. A gallon is 128 oz. You will not get water intoxication by drinking 40 more oz. 1 water bottle equals about 2 servings. It’s really not that much water. Especially if you are exercising or even being physically active at all.

source: 9gag.com