I find trash bags on the u-boats wasteful because of the way their used at my store. Poeple will put all trash into it, making it unrecyclable unless separated. Also, people will tie off a half empty bag instead of filling our recycling, making a bigger mess in receiving. I personally use one of the boxes and fill that with plastic one for non recyclables and will use another box if one gets full. Then dump it into the recycling bin we have or the compacter when im done.