pot liner without drain hole

its a pot liner i made for wife. not optmized. my first model.  used openscad to make this.

---code start----------

// Units: mm
height = 120;
top_diameter = 125;
bottom_diameter = 90;
wall_thickness = 2;

$fn = 100;

module pot_liner() {
   difference() {
       // Outer shell
       cylinder(h = height, d1 = bottom_diameter, d2 = top_diameter);

       // Inner hollow part
       translate([0, 0, wall_thickness])  // Start a bit above bottom
           cylinder(h = height - wall_thickness, 
                    d1 = bottom_diameter - 2 * wall_thickness, 
                    d2 = top_diameter - 2 * wall_thickness);
   }
}

pot_liner();

---------code end---------