Yes these trees are in coffee cups. I drilled holes in the bottoms. I just got these a week ago, swipped them from a friends yard. The moss was about a foot away from the trees so I grabbed some of that too. I will be working these next year, waiting for them to establish a bit.

Those trees are great finds. So are the coffee cup pots. I do the same thing with interesting bowls and dishes I get at goodwill. Recycled stuff is the best.
I would rethink the moss in with the trees. They require different amounts of water to stay alive. Moss likes it damp and shaded, trees do not.

The moss was on there just to show off a bit. It's already in it's own container. The cups were chipped and my wife was going to toss them. I have a soup bowl that I did at the same time. The tray under the cups came from Goodwill, got 2 for 50 cents. They had a big ceramic serving tray that I wanted, but it was gone by the time I got the money for it.

Oops. Yes I drill holes in them for drainage.

I have a masonry bit and a bit that drills glass.Using them, nothing is off limits.

I also use diamond tip dremal bits. They work great for porcelon. That's what I used on the coffee cups, cut thru them like butter.

I like the cascade, nice material. Let it grow and fatten up more, you can do this by putting it into a big pot or full ground if you can, that will give the tree an older appearance