I'm going to be camping in bear country for ten days this summer. I'll be carrying toiletries and energy bars. Food will be carried by the tour leader. Can the toiletries and bars be stored in air tight Tupperware "safely" in my tent? Wouldn't Tupperware be as efficient as the odorless bags?
Keep in mind that bears seek out food by smell.
So the question you have to ask yourself is whether your concern is with losing some food, or what the bear might do while looking for it.
Store ALL food at a remove from your tent. Worst case is you lose the food, but at least the campsite should be OK.