Bicycle underseat storage with light and wheel guard

A bicycle storage accessory, the accessory comprising:

• a container body defining an interior space therewithin;
• a lid configured to cover an opening in the container body so as to enclose the interior space;
• a mounting bracket configured to securably attach to a component of a bicycle;
• correspondingly mating bracket attachment structures on each of the container body and the mounting bracket, the correspondingly mating bracket attachment structures comprising a first portion formed on the container body or the mounting bracket and having a plurality of protrusions extending radially, parallel to a z-y plane, about an axis of rotation running along an x-axis direction, the correspondingly mating bracket attachment structures comprising a second portion formed on an opposite one of the container body and the mounting bracket and having a plurality of pockets extending radially, parallel to the z-y plane, about the axis of rotation running along the x-axis direction, and the correspondingly mating bracket attachment structures configured so as to permit the container body to be fixedly secured to the mounting bracket by, first, moving the container body and the mounting bracket toward one another so that the first portion of the correspondingly mating bracket attachment structures is received by the second portion of the correspondingly mating bracket attachment structures, and, second, rotating the first and/or second portions of the correspondingly mating bracket attachment structures about the x-axis with respect to one another such that each of the plurality of protrusions of the first portion of the correspondingly mating bracket attachment structures are received into respective ones of the plurality of pockets of the second portion of the correspondingly mating bracket attachment structures;
• and
• a wheel guard configured to permit connecting the wheel guard to the mounting bracket and connecting the container body to the wheel guard, the wheel guard comprising correspondingly mating wheel guard attachment structures on each of two oppositely facing sides of the wheel guard, the correspondingly mating wheel guard attachment structures comprising a first portion formed on a first side facing the mounting bracket or a second side facing the container body and having a plurality of protrusions extending radially, parallel to a z-y plane, about an axis of rotation running along an x-axis direction, the correspondingly mating wheel guard attachment structures comprising a second portion formed on an opposite one of the first side facing the mounting bracket and the second side facing the container body and having a plurality of pockets extending radially, parallel to the z-y plane, about the axis of rotation running along the x-axis direction, and the correspondingly mating wheel guard attachment structures configured so as to permit the wheel guard to be fixedly secured to the mounting bracket by, first, moving the wheel guard and the mounting bracket toward one another, and, second, rotating the wheel guard and the mounting bracket with respect to one another such that the correspondingly mating wheel guard attachment structures engage with the mounting bracket so as to secure the wheel guard to the mounting bracket.