After printing you will need to apply a little force to get the test tubes it. They fit pretty snugly.
You can print this not in vase mode but you might have to scale it up a couple percent as to get them to fit as a solid print wont have the flexibility of a vase mode print
If you have different sized test tubes you can scale this accordingly. For example:
I designed this to be printed with the following settings:
The author marked this model as their own original creation.