Water Bottle Pump to 1-gal Jug Collar
thingiverse
A simple way to secure your water bottle pumps (like https://www.amazon.com/Automatic-Dispenser-Charging-Drinking-Universal/dp/B07RWSHSBM) to 1 gal water jugs. Add some 1/4" tubing and you have a manual, battery powered method to refill your DE1 with ease.
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