Recently we discovered V8 Fusion. It is a blend of fruit and vegetable juices. David really likes it. Actually he prefers the light version as he thinks the original is a little strong - that is unless you use it as a mixer. Nothing like adding rum into your vegetable juice for a nice cocktail.
I wouldn't call them weight loss drinks but they do taste good and it is nice change from orange juice. Plus it is a good way to get some more veggies in our diet, since we aren't huge fans to begin with.