include <BOSL2/std.scad>
$fn=200;

module cap1() {
    height = 3.3;
    inner_diameter = 5.75;
    wall_thickness = 1.3;
    cap_top_thickness = 1.2;

    difference() {
        cylinder(h=height, d=(inner_diameter + wall_thickness * 2), anchor=BOTTOM);
        down(0.01) cylinder(h=(height - cap_top_thickness), d=inner_diameter, anchor=BOTTOM);
    }
}

cap1();