Made of PP or PVC, offered colorful 28 mm Fridge Bottle Caps are perfect for air tight sealing of drinking water bottles meant for refrigeration purpose. Injection molded body of these bottle caps denotes their high strength and long lasting quality. Being toxin free, these caps are suitable to be used for drinking water bottles. Ease of handling, stain proof surface, perfect dimension, standard thickness, precise threading design and good sealing quality are the key features of 28 mm Fridge Bottle Caps.