I've been working for about a year, on a concept of fine porcelain cups, made for latte drinking, that are easily stacked. It bothers me to see a dangerous mass of cups stacked on espresso machines at cafes, and I wanted to see if I could solve that.
I've been fiddling with the shape, thickness, materials, and I'm finally now at something I'm happy with. I've told the ceramics factory to go ahead, and in a few months we'll have these for sale on our website. After a year of refining shape, thickness, and materials, our Stacky cups are now available in quantity packs at reasonable prices. I can fit 24 cups on the tiny space I have next to my Decent.
If you struggle with a small coffee nook in your house, and a lack of space for cups on your espresso machine, this might be interesting to you.
The shape is crazy easy to pour latte art into.