Cryo-Crate
Even with slip travel between heliospheres, it still takes days, weeks, or even longer to traverse from world to world, and for time-sensitive cargo, the only secure means of transportation are cryo-crates. These are large, extremely well-protected boxes or pods containing all manner of important goods, including weapons with unstable ammunition or energy sources, perishable foodstuffs, decaying elements, or perhaps even lifeforms. Cryo-crates can survive re-entry, and in desperate times, they have been used as lifeboats.
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