Firebox basket for barbecue grill or smoker

A grill comprising:

• an ash depository;
• a firebox basket positioned in the grill above the ash depository;
• and
• a cooking rack positioned above the firebox basket;
• wherein the firebox basket comprises:
• a support basket defining an internal area, the support basket comprising:
• a plurality of concentrically stacked rungs that define a side wall of the firebox basket;
• and
• a grate positioned at a bottom of the plurality of concentrically stacked rungs, the grate comprising a plurality of bars;
• a plurality of ceramic pieces disposed within the support basket;
• and
• a plurality of feet configured to support the support basket above the ash depository such that a position of the support basket, together with positioning of the plurality of bar, optimize burning of fuel within the firebox basket;
• wherein the support basket is configured to support the plurality of ceramic pieces around the internal area of the support basket;
• and
• wherein at least one of the ceramic pieces of the plurality of ceramic pieces is configured to be removable from the firebox basket.