The Bio-container allows you to retain your current body’s traits and passively store residual regeneration energy. This block can be made functional by inserting an amputated Hand into the Bio-container.
You can retain your current traits by right clicking the Bio-container when regenerating. Note that you must target the block when regenerating.
You can also gain multiple Regenerations by Sneak+Right clicking the block when not in a regeneration state. Each Regeneration will use up 100 residual regeneration energy stored in the block.