The car Dante trapped in his first pocket dimension contained two individual. Both were male, and both were Level 2 Intermediate cyborgs. He quickly realized it was only a matter of time before they suffocated in the enclosed space, so he was forced to find a solution of some kind.
In the end, he settled on giving them air tanks used by scuba divers. He had to go though back alley channels to find ones that could last more than twelve hours. Those were usually used in smuggling things underwater and cost a hefty sum.
Dante didn't reay care about the price. He was currently performing an experiment, and keeping the two prisoners alive was an important part. The first time he checked on them, the two still had enough spirit to try fighting him. That spirit was lost when he erased a chunk of their car with a touch from his hand.