city contact re: blue bins?

Just wondering if anyone happens to know contact information (preferably email but I'd take phone) for blue bin related feedback? I think it's great the city has distributed these bins but they're pretty small and I'd like to encourage the city to allow people to use supplemental bins or bags if needed. The paperwork that came with our bin said that they won't pick up anything that's not in the bin except for cardboard. Seems silly -- I have a bin that I've been using for the past two years, I'd like to use it if I have more than will fit in the new bin. I did a bunch of digging around online but haven't found any contact info. Thanks!