Hello and thank you for writing! I will look into filtering by container type, by to be honest I don't think I will be able to do it. As to price per unit filtering, it is a popular request and I have done a good amount of research into enabling it. I have found that in order for it to work, you need to be logged in to your Amazon account, but that would compromise one of the key features of so.cool -- ability to search without being tracked, so I decided not to pursue it. Sorry -- probably not the answer you were hoping for.