Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not work.

I screws shut ok and clicks, but mine will open again no matter what position the lock is in or whether the key is in or out. So it's a locking cap that doesn't lock.I would usually assume I just got a defective one and would try again, but this cap feels so very flimsy that I am just returning it and looking for wnother solution.