Glass Milk Bottle Caps - 12 Pack - Only Fits Milk Bottles with 48mm (1.87 inch) Tops, Snap On Lids. 6 Glass Bottle Replacement Caps with Tampered Evident Seal, 48mm Diameter Bottle Lids That Fit Perfectly Stanpac & Libbey Milk Glass Bottles. Reusable, Long-Lasting and Easy to Clean Bottle Caps.