How often do you change from carrying one bag to another? Every day? Every couple of days? Every few weeks? I realized this week that I had carried four different bags already, and will move to a fifth tomorrow. I wondered if other people do this or if most folks stick with one bag for a few weeks or months before rotating to a different one. I realize this must be one of the most inane questions ever asked on tpf, but I really am interested in knowing.