If you are a big flavored water fan, Procter and Gamble now offers cartridges for its Pur Filtration System. You just plug it into your water filter and push a button to add some into your cup. Choose from strawberry, peach, or raspberry, none of which contains sugar, fat, or carbs. Pur is offering coupons good for $5.00 off a pitcher or faucet mount (each of which will set you back ~$29.99) and $2.00 off a two-pack which retails for about $9.99.