A dining garment for a child's high chair or toddler's table or other similar furniture article, comprises a tray cover, a bib extension of the tray cover extending over the tray, and a bolster disposed around and extending upward from the perimeter of the tray cover, the combination forming a basin. The bolster has sufficient rigidity to maintain the basin form and sufficient flexibility to facilitate installation, removal, and cleaning, without requiring inflation of the bolster and without requiring a separate supporting frame. The dining garment includes a trough between the tray cover and the bib extension for accumulating spilled food materials. A drain may be provided in the trough for draining the spilled material. The drain may include a cap, stopper, or plug.