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In the United States, nonfunctional slack-fill is prohibited unless (1) it performs an appropriate function, such as protecting the contents of the container; (2) it is necessary because the machines used for enclosing the contents in the package require it; (3) it is the result of "normal product settling"; (4) the package performs a specific function that is inherent to the nature of the food and is clearly labeled; (5) the product is a food packaged in a reusable container where the container is part of the presentation of the food, e.g., a gift product; or (6) the manufacturer cannot increase the level of fill or decrease the size of the package, e.g., where a minimum package size is necessary to accommodate required labeling information, discourage pilfering, facilitate handling, or accommodate tamper-resistant devices. As a practical matter, the states are more active in enforcing the slack-fill requirements than the Federal government.