How much juice do you drink, what kind, and how do you feel?

I am wondering, because I drink about 20 ounces a day and feel good. But when I manage to drink other 20 ounce cup, it feels even better and once it even stopped my tooth from hurting(I skipped dinner that night and just had a juice). In the best of the worlds I wish I would drink more everyday, but it is hard to find time.