Canning jar lid

This accessory makes it possible to reuse a 1 kg can of preserves as a generic container. The outer ring, by covering the cutting blade, prevents the hands from being cut.

https://telmo.club/projects/tapa-abatible-para-bote-de-conservas-de-1-kg/

https://video.nogafam.es/videos/watch/f91a5e8a-fb9a-49b2-a915-99fe5ce49183