There was a small puncture on the surface of the inner resevior, found out from the water leak during the first day I carried it. I didn't ask for an exchange for a new one because fear for the cost and prolonged time of international return shipping, and just patch it up my self with tape instead. Hopefully both BHI and OpticsPlanet would carry out quality inspections more carefully in the future, especially for internatinoal orders since all the difficulty in return shipping.
This review was written in the old system and had content requirements that are different than reviews written today.