Yeah they are, my new favorites for sure :) The molds came with 3 droppers, you can see one in the photo of the unfilled molds (which I found on Amazon). I think they created them so kids could use them.
I do think Pomegranate juice would work, any liquid juice would work very well even if it is thicker. I mean, if you found the mix gelling up before you could get it into the molds, then add a slight bit of water to the juice the next time around and it will thin it some. My guess is that it will be fine. The lingonberry I used was a concentrate, so I left it on the thicker side.