Multi Top lids screw on to the mouth of Mason jars and instantly upgrade them into versatile storage vessels with a leakproof seal, easy-pour spout, and secure flip cap that locks into position. Multi Tops are great for storing liquids, food and small items around the home or while on-the-go. The flip cap locks into position whether opened or closed, so it will never bop you on the nose or disrupt the flow of liquids as you pour. Each pack includes 1 black regular mouth Multi Top with silicone gasket and are made of BPA-free and phthalates-free plastic and silicone.