| 摘要 |
A substantially transparent carrier (24) for carrying a group of items (20), such as bottles which hold beverage, is made of a plastics material which includes a chemical blocking agent. The package (22) of carrier (24) and items (20) or carrier (24) may include a machine readable bar code (38) thereon. Each item (20) includes an individual machine readable bar code (34) thereon which is at least partially covered by the carrier (24). The chemical blocking agent blocks, by reflection or absorption, light having a narrow wavelength "tuned" or selected to prevent the individual bar codes (34) on the items (20) from being read by a bar code reader while allowing the bar code (38) on the carrier (24) or package (22) to be read. <IMAGE>
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