I think we're in the "nice tri-lite" area here.
There are some names, aquamilk, bluemilk, greenmilk, etc. which are being seen bandied about a little these days. I'm cautious with those. They seem to have been made for personal use of one or a few collectors. We have enough problems when we try to get a rigid definition for something like a buttermilk. I don't know how fun or constructive it would be to worry about the other names. And these extra Milk names were made up by people who like to have fun and enjoy their pretty marbles. So not for arguing about.
So . . . I like "nice tri-lite" !
BUT in case you're curious as to what someone might call an aquamilk - here's one which recently sold on ebay. Chuck sent me the link so I know that one's "right". Here are a couple of the pix.
(click to enlarge)
(I'm curious about the price it went for - that seems HIGH! - especially when looking at the moons I think I see.)
Note the size, 21/32".
These various "milk" marbles tend to be a little oversize. One reason the name "milk" sorta makes sense for many of them is that they are often found together with the buttermilks. For example, they're often seen together in Worcester Salt bags. And also often found together in collections in the wild.