1 can or bottle of your favorite veggie juice (I like Knudsens Very Veggie--the seasoning is more interesting and not overly salted like V-8)
1/2 cucumber (about)
1/2 green or other bell pepper
2-3 stalks of celery
1 garlic clove (more if you like garlic)
Dash of lemon juice if necessary (Very Veggie doesn't need it, other juices might)
Dash of your favorite seasonings (I like basil, thyme and powdered
This is easy and refreshing, and you can pretty much make it up as you go along (nothing is exact).