Cốc xếp chồng đơn giản - Nhỏ

I have a very smart dog who likes to learn new tricks.

One of the tricks I'm trying to teach it is to find the treat that's hidden under an object then sit when it finds it.
I was using normal red beer pong cups but those got trashed somehow.
I therefore designed this to play the game with my dog.

Print with the opening facing up, no support or any special settings needed. Just print and enjoy.