Stackable Spiral Vase Containers

I was playing around with non self-locking threads and this is the result: Stackable spiral containers, printed in vase mode.You can screw one container to the other. With the closed end facing the top you get a closed container.But I have to admit that this is more a design experiment than a usefull model. Try it yourself, print it and play with it. The smaller heights can be printed fast and do not need much filament. Print preparation:Make sure that your print bed is clean and grease-free and