Screwcap and bottle assembly

A bottle assembly comprising:

• a bottle comprising a neck, the neck comprising a shoulder and an opening;
• and
• a screwcap, the screwcap comprising:
• a shell extending along a longitudinal axis and configured to be disposed on the neck, the shell comprising:
• a head;
• and
• a skirt having a nominal outer diameter and detachably connected to the head along a bridge line, the skirt comprising:
• a first support ring disposed proximal to the bridge line, the first support ring having a first maximum outer diameter greater than the nominal outer diameter of the skirt;
• a second support ring disposed distal to the bridge line, the second support ring having a second maximum outer diameter greater than the nominal outer diameter of the skirt;
• and
• a third support ring disposed between the first support ring and the second support ring relative to the longitudinal axis, the third support ring having a third maximum outer diameter greater than the nominal outer diameter of the skirt;
• wherein the shell is crimped to the neck, such that at least a portion of the third support ring deforms and engages the shoulder of the neck after crimping, wherein the third support ring has a third maximum crimped outer diameter after crimping, and wherein the third maximum crimped outer diameter is less than the nominal outer diameter of the skirt.