A hair pulling!

Visually nothing wrong, it's still a flange. For cons, the cap and its two retained all plastic system are of poor quality.
Indeed, the game between the successful system and the cap is very high (> 2 mm) of the blow the cap goes into "cross" and locks. Unable to turn to screw or unscrew.
By forcing you foirez no plastic screw cap with great ease (yes it's plastoc) and you voilàavec flaccid unusable after 4-5 uses.
I put 1 star seems as container quality.