We recently broke the plastic part of the opening port that covers the hinge. It is an integral part of the opening part of the glass. I think that the ports were made by Bowmar. If anyone knows, I would be interted. I read, with interest, about ordering new ports from Nova Socitia, but would prefer to just repace the glass (plastic in the port). Please let me know if you have any experience, and problems I may encounter.