The most effective closures for our lead and toxin-free glass containers are 31.5 MM RO CAPS GOLD METAL, which keep your items secure for a long period. These lovely coloured closures enhance the appeal of our FSSC 22000-certified and food-grade glass container. Not only that, but we also provide customization choices in addition to our caps and closures, which raises the perceived worth of a product. Even when the product or liquid is shaken upside down, these caps and closures provide a perfect, leak-proof seal.