What are the key differences between a bear canister and a bear bag for storing food while camping in bear country?

A bear canister is a hard, durable container that is bear-proof and designed to keep food safe from bears by preventing them from accessing it. A bear bag, on the other hand, is a bag made of strong material that is hung from a tree branch to keep food out of reach of bears. The key difference is that a bear canister is a solid container, while a bear bag is a hanging bag. Both methods are effective in preventing bears from getting to your food while camping in bear country.