A fire-resistant collapsible enclosure can include three or more sidewalls coupled with a cross plate internal to the enclosure. A top portion of the enclosure can include a non-linear edge configured to be an airflow outlet, or a bottom portion of the enclosure can include a non-linear edge configured to be an airflow outlet. The fire-resistant collapsible enclosure can be configured for use as an oven, a stove, or a smoker. In an example, two or more of the fire-resistant collapsible enclosures can be used together, such as where one enclosure is configured as a heat source and a second enclosure is configured as a smoker. In an example, the cross plate can include a throttle to control airflow through the enclosure.