Abstract: Various examples are provided for a nestable cooler and a nestable cooler system. In one embodiment, the nestable cooler includes a hard-shelled body. A lid is coupled to the hard-shelled body and movable between an open position and a closed position. The hard-shelled body includes a first and a second longitudinal sides formed with a shelf on an interior surface of each of the first and second longitudinal sides, each shelf protruding inwardly into a cavity. The nestable cooler system can include the nestable cooler and a second nestable cooler. A base of the second nestable cooler can rest on the shelf when the second nestable cooler is disposed within the cavity.