Have been for a long time. We only buy what we eat and simply rotate the supply on a regular basis. If you have little room to buy, try setting aside just $5 a week to buy some staples to stock your shelves. You can get ideas from the Survival Mom website.
http://thesurvivalmom.com/
Just like we prepare to make our quilts and other projects, it is important to get basic staples stocked including medical supplies.