Lassi
Lassi is a south indian drink, and one of the easiest things to make. There are many ways of making it, but essentially it is buttermilk (yogurt whisked with water or your very own whey/klabber), and you can choose almost any consistency that you like, from the thinnest to the thickest.

Yogurt/kefir are on the okay list even though it is milk because it is pre-digested by acidophilus. This converts the milk sugars and milk proteins and makes it easily tolerated, even by some people with lactose intolerance.

If you do have milk sensitivities, you may be better off using whey instead of yogurt in these recipes, although some people have complained of intolerance to even whey, I suspect this may be a healing crisis reaction rather than a true allergic reaction. People underestimate how important microbes are to us and usually don’t have any comprehension of how strongly they can affect our digestive systems both for good and bad except perhaps when suffering food poisoning.

For a broader base of friendly microbes, you can substitute kefir for the yogurt in these recipes. The best kefir is make from scratch in your own home from kefir grains (see recipe and link below).

Pitta dosha people may want to substitute cottage cheese for the yogurt/cream part of these recipes.

Feel free to change the recipes so that the consistency is the consistency you enjoy. Some prefer a much watered down version of these drinks, which is fine. You may also want to try these recipes with your own almond or rice milk! :)