Resource Barrel

First you have to understand that on Mars there is a very thin oxidizing atmosphere. The currently thin Martian atmosphere prohibits the existence of almost all substances at the surface of Mars, including liquid water, but many studies suggest that the Martian atmosphere had been much thicker in the past. The atmosphere of Mars has been losing mass to space throughout history, and the leakage of gases still continues today. For these reasons on Mars every element and substance needs to be enclosed in a standard airtight capsule, commonly called "Resource Barrel"

The standard Resource Barrel has been adopted for a few years now and was used for all manned missions to planets or moons with weak, oxidizing or corrosive atmosphere.

Resource Barrel if not augmented has a standard capacity of 130 units. At any given time a Resource Barrel can only hold one type of resource, or it can be empty. If a Resource Barrel contains a certain resource, it needs to be emptied before another resource can be transferred inside. Contents and amount are shown on the standard display placed conveniently on the side of the Resource Barrel.