# Containers

> Overview of ZAPP containers.

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LLMS index: [llms.txt](/datacenter/zapp/llms.txt)

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ZAPP containers can embed multiple data formats in one container. Key features include:

- Minimal overhead: 4-byte container header and 10-byte header for each payload
- Variable-length multiple payloads with no inherent container size limit
- Extensible via IANA ID + TypeID mechanism

![Diagram of a ZAPP container header followed by multiple payloads and their headers](../container.png)