Player > Feats > Enclose Serums
Due to your unique physiology, you can safely store important medicines inside yourself until you require them for use in an emergency.
Adaptation or early stage adaptation racial trait, or ooze type.
You can store one serum or medicine within your body; this does not count against your bulk limits. As a move action, you can internally open and absorb the item, gaining its normal effects as if you had consumed it.