12units Empty Jars Glass Bottle with Aluminium Gold Color Screw Cap 60ML Sealed liquid Food Gift Container (12, 60ML-Golden Lid)

Was looking to make my own single dose storage system for coffee. There are companies selling these tubes with a wooden holder, which is nice don't get me wrong, but they're so freaking expensive. These are made of glass, with an airtight lid. They are clean and hold coffee well. I have the 60mL variant, pictured is 17.5g of beans. There's some headroom left, so I think they could hold around 22g or so, but that's a huge dose for espresso.

I use these when I make yeast starters for brewing beer. You don't need a test tube rack, these bottles stand on their own. They work perfectly for me.

Used for single dosing on espresso. Not sure they’re air tight. And they all weight up to 3 grams different. It saves time. It was cheap, and I trust glass more than plastic.