Many of the canisters had different type bags but not all, most had nothing. The bears 'identify' by sight these days, hence not food/odor as that is in the past. Interesting cavet, smashing the lid down often gets in the way of the metal twist lock binding plastic bags which result in a false sense of locking. I can't remember the exact number, but it was many-improperly locked, all 3 must be locked to be secure. Another thing they found was the number of people using their fingernails vice a coin or knife blade. I put Sharpie silver dots beside each lock to remind myself to line coin slots up. I also have attached 2 pennies with a hole drilled through and short Dyneema cord on my food bag and hip belt. On my BV canister, I seamgripped a plastic credit card holder on the lid keeping the old credit card handy for those really cold mornings when the push tabs are stiff. If you happen up on a Backcountry Ranger in the Smoky's, ask them about 'those Opsaks.'