Ajanta Bottle's 31.5 MM RO BLACK METAL WITH PLUG, The black metal closure, which is our most popular glass bottle cap, keeps goods sealed in glass bottles, ensuring their quality and safety. We also provide these closures with possibilities for customization. Brand recognition and brand value are increased by brand names and emblems printed on glass container lids. These lovely coloured closures enhance the appeal of our FSSC 22000-certified and food-grade glass bottles. These caps and closures offer a flawless, leak-proof seal even when the product or liquid is shaken upside down.