Easily holds multiple medium sized water bottles along with other accessories. For those small items you don't want to lose in the main compartment of the bag, the rider-facing end offers additional compartmentalized storage with an additional zippered internal compartment. This bag is a great addition or complement to the Ogio bag I bought a few years ago. Secured to the top of my FJR1300's black metal fuel tank with just four small but powerful magnets, it was held securely in place when the capabilities of the 145hp FJ engine were tested. This tank bag is just the right size for my needs. Comparatively, this tank bag in this form factor offers the best price-performance ratio for me.