Zefal Bag Z-Box

Basically, it's a hard plastic cylinder with a screw-on cap, so it's waterproof. Sweet. I bought the large size, which has a screw-in extender that goes in between the cap and the main body. This extender has a partition that screws in just above the threads that attach it to the main body. So, depending on preference, you can have an extra separate compartment, or just extend the main body storage space. It's simple, but clever.That said, I didn't end up needing the extender. Without it, the tube fits my spare 700c 32 tube, multitool and tube repair kit/tire removal tools with ease. Keys would also fit, maybe a small flip phone (the tube's diameter is just too small to fit my Galaxy S6), but not much more. For me, the size is pretty much perfect.It fits snugly into my water bottle cage, secure enough for road riding, but more aggressive off-road folks will probably want some velcro straps or the like to ensure it doesn't bounce free.EDIT: I've since eliminated my bike pump mount, and using the extender on the z-box (with the "floor" removed), it now holds all of the above, plus the bike pump! I love this thing!

Awesome storage option for an extra bottle cage. I was a little hesitant purchasing this one because I knew there was a divider between the top and bottom portions on the large size, that could restrict the lenght of items it can hold. However, the divider can be removed and stows away in the cap. I'm surprised they don't mention this in the description. Overall great design and good quality!

I fit my entire repair kit in this including a tube for a 27.5+ tire. It makes it heavy but it fits. I would like the option to buy a custom cage for it as it's loose in my water bottle cage and I had to add zip ties to hold it in given it's weight. May be OK for road riding but I bounce around a lot on trails.

The storage container fits in my bottle holders without any issues. It seems fairly well constructed for what it is. The threads and cap work well and it seems solid enough that it won't break. Best part about the size large is that you can make it smaller by removing the top section, and the top section has a removable cap between the top and bottom sections so you can have two small separate sections or one big one. Pretty smart design. I use this mostly as extra storage beyond my seat bag when I don't want to ride with a backpack.

This is a well built container that has a nice, wide opening in it for getting things in and out. I was actually surprised by how bit it was. Roughly the height of a 24 oz water bottle (including the valve). Since the cap of most water bottles are an inch or so lower than the top of the valve, I guess I wasn't quite prepared for how big this container really was.I ride a medium Salsa Cutthroat which has 2 water bottle holders on the inside of the down tube and 1 water bottle holder on the inside of the seat tube. This bottle will fit in either the lower down but holder or the seat tube holder but it is a very close fit.I use the bigger compartment to carry a spare inner tube for my bike (the tubes for a 2.2" tire are pretty big).

Works exactly as I had hoped. These are cheaper than a saddle bag and easy to transfer between bikes for short training rides. I could fit spare tube, patch kit, inflator, two CO2 cannisters, tire levers with room to spare.

I own both sizes of this tool bottle. I needed the bigger one to hold all my crap.The bigger one is just the small one, plus an added topper that adds a second separate storage space.It is not one big long area to put things.Also the taller one feels like it could just pop its top in the wrong circumstances. It hasn't happened, and maybe I'm being too harsh, but I would only recommend purchasing the smaller one if you can make it work.

Product is a little smaller than I expected but seems like it will work for my needs. I hope. Now the delivery and wait time was ridiculous, don't know who to blame. This small package was received in Philly USPS distribution center on March 28th and sat there 10 days and I just received it today April 8th. Its literally 3hrs drive from me in Philly.INEXCUSABLE!!!!!!!!!