This week mine was homemade soda. Fermented sodas, citric acid + bicarbonate sodas, different juices and flavors like lime + lemon + cherry and pomegranate or mango peach or cola (homemade knock off)
I just got into them so I’m using Lamy Safari and China pens from AliExpress right now. Want to see if this lasts or passes before I sink some serious money into a good pen haha