24-Pack of Replacement Caps. Include tamper evident sealing liner.. These caps fit the Liberty Supply 500ml Glass Maple Syrup Botles. 28mm (28-400 neck finish) Black continuous thread plastic cap with a three-ply co-extruded polyethylene foam liner (F217 style). This closure is made of polypropylene (PP) plastic and fits our 28-400 vials, bottles, and jars. This plastic cap features a textured (matte) top and a ribbed side. The ribbed-sided design allows for ease of use when removing the lid. The 3-ply foam liner is compatible with many substances and is great for general lining applications.