Actually, the Ursack did pass the zoo tests. They even show a live test on their website. That's why they received conditional approval from SIBBG several times. Per SIBBG, the Ursack had too many failures in the field. Most of those were user error, but both SIBBG and IGBC feel that if a product requires any intelligence on the part of the user, it won't work. It is true that Sierra bears are habituated to think that anything in a bag is a pinata and will keep working at it until it gives way.

Supposedly both agencies have stopped testing bear-resistant containers, but the new outfit that was supposed to do the testing isn't. This per an ongoing thread on BPL. The tests that both agencies were using was to smear food on the outside of the container and let a captive bear go at it. This means it's highly unlikely that the OP will receive approval--either nobody will test it or it won't be approved if the standard preliminary tests are used.

Oldranger, LOL!!!