| 摘要 |
Packages and structures with selective dosing of active agents are described. The at least one active agent includes a freshness-extension agent to inhibit spoilage of perishable product disposed in the package, an odor management agent to reduce, mask, or neutralize odors from garbage or waste disposed in the package, a color indicator to indicate the status of one or more other active agents, or another type of agent. Selective dosing is achieved by covering the active agent or agents by a plurality of covers. Some of these covers may be walls of a package itself.
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