One of the reasons why I like these mason jar lids is that they don’t rust like the regular lids can do. These lids, called 'iLids’ (ha!), are made of food-safe polypropylene #5 that is free of BPA, BPS and Phlatates. They are recycled and recyclable and made in North America.
The Drink lids are really helpful for me when I’m out and about. I usually have a homemade smoothie on hand and the slide along opening/closing mechanism, as well as the straw hole, make it easy to keep my healthy habits up on the go.