I've got good news and bad news for you. Diet Yoo-hoo, or Yoo-hoo Lite (its given name) does, in fact, exist. I have tried it and it's FANTASTIC! Each 9 oz. bottle has just 70 calories, 1 gram of fat and all the chocolatey goodness of original Yoo-hoo. That was obviously the good news. The bad news is you can only find Yoo-hoo lite at Wal-Mart Supercenters or in select grocery stores in Alabama, Florida, Georgia, Kentucky, the Carolinas & parts of Tennessee. If you'd like to help us in our quest to make Yoo-hoo Lite available nationally, let the Yoo-hoo makers know how you feel. C'mon people, this is important!