Get two more prints! The Purex Crystals printable coupon just reset. That means it can be printed twice more, even if you previously printed. This month at Walgreens, Purex Crystals are on sale, buy one get one free. According to the Walgreens coupon policy, a coupon cannot apply to a free item. Buy four bottles and use one high-value $3.00/2 printable coupon. The final price is $2.65 per bottle!