These bottles include a linerless blue polypropylene cap and blue polypropylene pouring ring. Specifications: Type 1 Class A Borosilicate Glass Sizes: 50ml, 100ml, 250ml, 500ml, 1L, 2L, 5L, 10L Includes Polypropylene Screw Cap And Pouring Ring Case Quantity: 1 For 5637-05000 & 5637-10000 (10) For The Rest