Summary

I changed the design from starno to match the dimensions of my toothpaste. Actually I did a new design to have a parametric cad file. The slot has a lenght of 49 mm and a width of 2 mm.

I printed it with Colorfabb XT.
0,1 mm resolution.

Update 31.05.2015
I changed the radius on the bottom and added a second file with a slot length of 55 mm.