Here is the rearside of the flacon with Rarity's cutie mark.
On a personal note, if any of you have any Rarity related crafts I would very much appreciate if you submitted them to Equestria Daily for Rarity Day. Lately many of the submissions I made for the character days were never included because there are often too few crafts submitted by too few artists to justify the creation of a crafts themed page that day. I am grateful for any support to make a crafts page happen on the upcomming Rarity Day 2018.