Soy Milky tastes the most like regular milk of all the ones I have tried (so good, bonsoy, Australia's own (? something like that), vitasoy). The full fat ones taste significantly better than the low fat ones as a rule, however the so-good one thats in the purple-ish carton was not bad either.

Rice milk has a different texture and can be a bit grainy, but Milo drink this fine - its what he has if he gets gastro-induced lactose intolerance. Soy milk constipates him so he can't have that.