The classic mason jar is a staple kitchen tool for canning and preserving vegetables and even filling with screws and fasteners in the garage or workshop. Their major drawback is the steel lid and band will rust and warp over time, possibly resulting in the contamination of the foods and liquids inside the jar. Available for both wide mouth and regular mouth jars, Masontops Tough Tops are made of durable BPA-free plastic and contain no toxic chemicals (such as phthalates) so theyll provide many years of use without rusting or warping. Tough Tops feature a custom-engineered silcone gaskets that fits precisely inside the lid, so it wont slip out like most similar rings. The gasket provides a perfect airtight seal, so liquids wont leak out and bacteria wont get inside. These lids also feature faceted sides with make them easier to open and close and prevents jars from rolling when on their side. And you can use them in every room of your home, in the workshop and even the office. They make excellent storage containers for liquid and dry foods, theyre great in the bathroom for storing band aids and other first aid materials, for beauty and craft supplies and yes, theyre great for organizing fasteners and other hardware items in the garage. Their premium quality construction allows them to stand up to years of dishwasher heat and freezer temperatures. You can trust the experts at Masontops for the best and most durable mason jar tools and accessories!