When on a bike there is only so much you can carry. Sure there are plenty of saddle bags and even packs you can carry but for those of us who like a streamlined and minimalist look, it means stuffing too much stuff in jersey pockets.
Now you can stuff tire irons and patch kit in a second water bottle, but that can leave you somewhat thirsty. A better option is the Kargo Cage from King Cage, which features a stainless steel cage and a ballistic nylon bag that can be stashed behind the water bottle. This is enough to hold a tube, CO2 cartridges and tire irons – just enough stuff to ensure that you aren’t walking home.