You are looking at version 2 of this file because version 1 didn't account for the tube getting wider when it becomes empty. To fix this I combined two shapes into one more complex shape. Who knew designing a toothpaste trey would be so complicated?

To get a good print go with 1mm layer height and 20% infill.

As always, all the credit goes to Zack Freedman for releasing Gridfinity!