I wanted to make sure that the extension was airtight, so I modified it to have an inner lining made from flexible TPU. It requires a dual filament printer.
Picture is after about 1 year of use. The TPU discolored, but stayed flexible. The inside was originally bright white.
Printer Brand:
Ultimaker
Printer:
Rafts:
No
Supports:
No
Filament: Ultimaker PLA and TPU Black and White
Notes:
I used black PLA for the outside and white TPU for the liner. Dual filament printer required.
The author remixed this model. Imported from Thingiverse.