Bottle cap with fan
Description
To make vinegar from wine you need a jar/bottle with a wide opening for ventilation. However, you can also use a 15 liter demijohn with a narrow neck. For ventilation you use either an aquarium air pump or a wort aeration pump or this 3D printed cap with built-in fan. You must close the opening, cap with a fan, with a cloth to prevent fruit flies and other pests. The cloth can be cheesecloth or another air-permeable cloth. The fan has the dimensions of 40x40x10 mm and requires =12 Volts power supply. Adapters/powersupplies starting from =7 volts are also suffice. A fan is available from 2.50 Euro. THIS is not tested (printed and used) yet. That will happen in July 2024.
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