While I wouldn't use this as a replacement for a bear bag, the people over at Watchful eye designs state: [snip]
"While most bear proof containers allow the bears to detect food but don't allow the bears to get into the containers, O.P.SAK actually keeps the bears from coming to the campsite at all. Keep both food and toiletries in an O.P.SAK and you can even leave them on the ground outside of your tent. Make sure not to contaminate the outside of the O.P.SAK with food odors." [snip]

Does anyone in the group have experience with these?



http://alaskaoutdoorjournal.com/References/beartips.html
offers some comments on the subject of bears though I'm not qualified to judge it's accuracy.

http://www.corbon.com used to make one of the best "big game" rounds which might be a good survival round.