I was asked to post some pics of this deck. I funded the Kickstarter project for this. It looks like they only sold 24 in the KS project and they are sold out on the website (I have asked them to consider making more). I am suspecting they did not do more than 50, if that.
Anyway, they can be shuffled just like regular cards. Mine have a curve, but that is because I keep forgetting to take them out and play with them. Perhaps if I was able to acquire a second set I could do that. These are for permanent display in our little education center.
If you want more pics please post and I will upload some.