Purchased the smoke 590 and also have the smoke 450 as well. Both have their own purpose. For instance, the I use the 450 if I am well hydrated already and going on a quick 3-4 mile sprint. The 590 I take on longer rides that are closer to 8-10 miles. It’s easy to switch between the two sizes with the locking mech on the bottle. I prefer to use a hex key instead of a flat head screw driver but to each he’s own. The functionality on removing and setting the bottle back on the bike is simple and intuitive. I used the available print out of the bottle sizes to insure that they fit my NS Snabb E enduro MTB. Thanks Fidlock

I purchased this bottle as my revel Rascal had limited space with my pump mounted to the frame and I wanted the option of running a fidlock bottle bigger than the 450. This fit like a charm. Great bottle and mount

I love the bottle, and it is my second one to add to the 450 bottle I already had. Unfortunately it is just a little too large to fit on my bike. If the lid would lock in perpendicular to the magnet instead of in line with it, I think it would work. I still carry it in my jersey and with the sealing lid I stay dry!

I've been using fidlock bottles for the last 3 years. Love the new design and top.

I didn’t think it would be too different from the last bottle but it is! Both are awesome but I love how you can squeeze this one and the cap over the mouth piece! Would buy again! Do it!