Airtight Filament Canister

I had problems with moisture getting into my filament and causing little pops on the side of my prints. I realized when the problem did not occur with a fresh spool of filament that my filament was absorbing moisture. This Airtight Filament Canister solves the moisture problem and provides convenient storage. It includes three cradle designs which allow the filament spool to move freely. The filament is fed through an airtight connection using either 1/4" PTFE or 4mm PTFE tubing. You may use either the 1/4" PTFE connection or the 4mm PTFE connection. The canister is completely airtight except for the small hole in the end of the tubing where the filament exits. The hole is plugged by pushing the end of the tubing into the matching cap. If you would like your canister on a shelf above the printer, you may install the filament port on the side of the canister near the bottom.

There are three versions of the cradle, a one piece design for narrower spools 53 - 70 mm, a one piece design for wider spools 63 mm - 80 mm and the newer adjustable 3 piece design. The adjustable cradle is better than the previous one piece designs. I suggest going with the adjustable cradle. See Update 5 below. This cradle designs require only four 608 bearings and they print quickly.

The Rubbermaid container is a 21 cup size and can be bought at Amazon.com for $10.
https://www.amazon.com/Rubbermaid-Modular-Storage-Container-1776473/dp/B003EYUZJU
PTFE Ports for 4mm and 0.250"…