Soda Machine CO2 Cylinder Refill Adapter Hose Soda Maker Co2 Canister Refill Station for Filling Soda blue Co2 Bottle

I bought this one: https://a.co/d/00r3Ocuu I'm generally happy with it. I have my tank up on very sturdy shelves, upside down, with proper gas cylinder mounts/straps to ensure it stays put, even if there's an earthquake. And I keep two of the small bottles stored next to it, in a box, with a Sharpie label that tells me which bottles are "full" vs empty (which way the valve is pointed). I'm certain there's a better way, but I'm pretty lazy and this system seems to work just fine for my needs.