Hand Washing Milky Planet?

Ok, so I am going to sell an item soon, and would like to make sure it's nice and clean for the next owner, so I was wondering if Milky Planet Lavender can be cold water hand washed.  

I saw on the old list that the Yellow colourway can, and that a dry cleaner may take off the glitter; however, I haven't seen anything on any of the other colourways.

Anyway, if anyone has any tips for this piece or at all, please let me know!