I wanted storage for tubes and tools but I have behind saddle bottle holders. This holds plenty of stuff and is 100% waterproof.
I like to store my rain coat in Elite Byasi. A regular water bottle does in and out instead of straight down which makes this more convienent. It also is lighter.
I bought a new bike and wanted x-tra bottle holding capacity so I installed a two bottle unit behind the saddle. This storage bottle fits nicely behind the saddle. I have the 600 and there is TONS of room in it for two tubes, a few CO2 bottles, some tools, gel, inflator, tire levers, etc.
I find this type of storage bottle useful for shorter rides. I have the mid sized bottle in which I carry a hand pump, tire levers, tubeless plug tool, a multitool, TPU inner tube, patches, and a quick link.
It's out of the way, secure and easy to access. No weird issues with the cap unscrewing itself so all in all, a handy thing to have for the intended short rides. Any color you want as long as it's grey.
My only nit pick, the bottle material is thin. I wouldn't over pack it as I fear It might tear.
This is a good product to store tubes, CO cartridges, etc. if you don't want to use a saddle bag and if you have a spare water bottle cage to put it in. I got the largest size offered and I have a 32mm tube, 2 CO cartridges plus adaptor and multipurpose tool and it was a tight fit. If you want to ride with a saddlebag but use this as a back for snacks, keys, etc then you can probably go with a smaller size. It's sturdier than a saddlebag but the biggest considerations to give when getting this will be what are you carrying in it and do you have a second (or third) bottle cage to carry it in. I use this on my gravel bike and have two cages, if I want to ride with a second bottle then I'll either need to add another cage or revert back to a saddle bag for the ride.
This tool storage bottle is big enough to hold all my tools for multi-day rides. Lid is secure and stays tight even after riding off road trails.
This 'bottle' makes a perfect container for a take-along tool kit. It fits perfectly and inconspicuously in the bottle niche on the rear of my Topeak rack-trunk bag.
This fits a spare tube, two CO2 cartridges with chuck, two tire levers. What you need. It is not too big, fits great in bottle cage.
