Add glas

testdata/glas.scad

@@ -0,0 +1,9 @@
+$fn=100;
+
+cylinder(2, 15, 15, false);
+cylinder(31, 3, 3, false);
+translate([0, 0, 30]) difference() {
+    cylinder(15, 3, 22, false);
+    cylinder(15, 1, 20, false);
+}
+translate([9, -2.5, 0]) cube([5, 5, 5]);