Cpt Davenport,
No, mainly for hygienic reasons so you do not contaminate the food you eat.
If you remove all food from the canister and put it in say a bag which is in turn put in a food locker and you put a liner bag in a Bear canister then it may be OK (up to you to decide) to put trash in the Bear canister. However, I do not recommend using a Bear canister for trash or any other waste.
However, if there are no trash cans or other means of disposing your trash out of sight then putting it in a plastic bag and putting that in your bear canister may be the best thing to do.
In all cases Bear canisters can be and should be cleaned with soap and water between trips. I further recommend not leaving any food items stored in a Bear canister for long periods of time. Be sure to remove contents and clean it before putting it away after a trip.
To be as explicitly clear as I can be, what I said was;
In Bear country hanging trash outside is a Bear magnet. Bears have an incredible sense of smell and will investigate anything that smells remotely like food.
I need to add that smell is not the only thing they rely on. If they even see something that they have previously found to be edible, they will seek it out: such as a candy wrapper, cans of food and other things like toothpaste or cough drops in your vehicle that are visible though the windows. Lots of cars have been broken into and torn apart because of candy wrappers, chewing gum packs, Altoids, and etc.
The parenthetical comment (A company I am a partner in makes Bear resistant containers for backpackers and other campers for which we have done considerable testing with live Grizzly and Black Bears). Was intended to indicate I have a reasonably good idea about what I am talking about relative to Bears and in particular keeping food and trash away from them.
I hope this clarifies things. ;-)
I wish you enjoyable and safe, Bear trouble free, camping.
Craig
Edited by ckent323, 22 August 2023 - 09:28 AM.