Twist-on design is simple to add or remove Perfect replacement for lost or worn lids designed specifically for the Acopa mason jar line Embossed sides provide a firm grip to easily remove the lid for convenient refilling Made of durable metal for long-lasting use Keeps dust, debris, and airborne contaminants out of beverages A great replacement lid to keep on hand just in case yours gets lost or damaged. They are a great value and really come in handy. We lost one of ours at an event and were so glad we could purchase a replacement here. It shipped so fast and made it here before our next event.