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Liquid scent could be spread on a tree or shrub but bait for bears cannot be contained in anything non-biodegradable in the short-term. In order to make sure you were abiding by the law, you should probably just spread the scent on the ground or in a tree, etc. at the bait site, properly tag the site, and make sure all the other laws are being followed. Officers are concerned about what might be considered litter or trash left on site, and anything man-made needs to be picked up. Containers can be up to a maximum size of 55 gallons.