[Boomer]

The same question was asked on Amazon. The short answer is the green will dissolve in cold water; the red and orange will not.

http://www.amazon.com/forum/-/Tx3S421ZI500MFK/ref=ask_dp_dpmw_al_hza?asin=B005KG7EDU

[FrdmLvr]

Okay, thanks. I knew there had to be a reason I went with the green - I use it in my morning smoothies.