module hexagon_tray(
    side=25,
    walls=2,
    h=16
) {
    difference() {
        cylinder(r=side + walls, h=h, $fn=6);
        translate([0, 0, walls]) cylinder(r=side, h=h, $fn=6);
    }
}

module hexagon_lid(
    side=25,
    walls=2,
    tolerance=1,
) {
    union() {
        cylinder(r=side + walls, h=walls, $fn=6);
        translate([0, 0, walls]) cylinder(r=side - tolerance, h=walls, $fn=6);
    }
}