Dirty laundry; everyone’s got some, and it all stinks. Luckily, Amazon has a $3 coupon on many varieties of Tide detergent 50 ounce 2-packs today. After the coupon, you can expect to spend $15-$16 total. Not bad considering these usually cost $11 or $12 per unit at the grocery store. Sign up for Subscribe and Save for even greater savings.