The item [Blood Reservoir of Physical Prowess](http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/a-b/blood-reservoir-of-physical-prowess/) states that you can spend a minute and take 4 points of Con damage to fill it. Blood in this is prevented from decaying. However, Can you spend the minute, and take the con damage, to fill a non magical vial?

Can you then take the non magical vial and use it to fill the Reservoir at a later date, presuming the blood has not spoiled?

The reservoir states that *"When filled with the wearer’s blood, it gains powerful magic."*

It does not state that the blood needs to be fresh, and AFAIK blood can be stored close to two months without being frozen. I imagine this changes given conditions. I could not find any explicit rules on how long blood (or animal components) lasts ingame.

**Can I store spare vials of blood to refill a Blood Reservoir midday without taking the constitution damage as long as all the vials filled caused the con damage?**