Can't handle extreme temperatures!
Used the Bear Vault on a 3 week trip in the Sierras. At first I was very happy with it, but eventually two serious problems emerged:
1. When it is really cold (high 20s), it is extremely difficult to open - the plastic becomes so hard you cannot press it it enough to get past the notches.
2. When it is really warm, the plastic lid becomes soft and I could open the canister by twisting it hard and fast - not very confidence inspiring. Mine may have been a defective model, but it was certainly not bear proof in warm weather.
I ended up returning it...looking for alternatives...