$fn=64;

// Parameters
tray_diameter = 150;
tray_height = 15;
wall_thickness = 2.5;
base_thickness = 2;

module drainage_tray() {
    difference() {
        // Main outer body
        cylinder(d=tray_diameter, h=tray_height);
        
        // Inner cutout for water collection
        // Height is slightly larger to ensure a clean manifold cut in preview
        translate([0, 0, base_thickness])
            cylinder(d=tray_diameter - (wall_thickness * 2), h=tray_height);
    }
}

drainage_tray();