Health Packs are items that are featured in Halo 3: ODST and Halo Reach, it was diversely used in Halo: Combat Evolved in Campaign levels. It is manufactured by the UNSC and used by any unit from the same force. It holds an amount of helpful items to heal a wounded trooper in it, though walking over it and collecting it should be enough.
Throughout the campaign levels in Halo: Combat Evolved, the Master Chief will encounter the Echo 419 which contains a couple of Health packs in it. Those hanged health packs are considered "Static" and can't be used or interact with.
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