WooHoo! There is a new Silk milk coupon available! Just head on over here and login to your account by clicking on the â€œStart challengeâ€ link â€“ upper right corner (or sign up to take the Silk Soy Milk 10 Day Challenge). After logging in or registering, youâ€™ll automatically be offered a $1.25/1 Silk Half Gallon coupon. Pair this coupon with a sale and youâ€™ve got yourself some very inexpensive Silk Milk!