You can use the PET Strip Spooler to easily store strips from PET bottles in compact form and nicely winded. Up to 7 spools will fit into the spool holder. The strip can be leaded from the holder to the machine for conversion to fillament. The strip unwind freelly.

I'm using this spooler for some time and it works very well. You will gain the skill after a few bottles.

Bill of material:

• M3x20 screw with allen hex head

Assembly:

The hex screw is screwed directly to the spooler body.

Here you can see how to use the tool: