Ball 36010 regular canning jar reusable plastic storage caps, white, BOX OF 8. White color. Ball Regular Mouth Plastic Storage Caps are ideal for storing or freezing with Regular Mouth Glass Preserving Jars. The versatile Ball Regular Mouth Plastic Storage Caps provide more ways to store your creations. You may refrigerate, freeze or store. Each package contains 8 reusable plastic storage caps. Not for use with the FreshPreserving process. Dishwasher safe. Does not contain bisphenol A (BPA).