It's a recreation of a Tenex 300 series tape dispenser. I used a 20mm wide metal tape cutter blade from another old dispenser.
The top half can just be pressed on the bottom half and you could fill the holes with sand if you want to make it heavier.
Edit v2:
Made another version of the lower half which can be used with a printed blade. Works less reliable than the metal version but is at least printable ;)
The author marked this model as their own original creation.