I discovered a whole new area of Amazon.com while re-ordering my favorite tea last night. You can now set up subscriptions to common household items and get 15% off the regular Amazon price and shipped free at the interval of your choosing. Visit the site: here.
This seems like it could be competing with Costco on the bulk prices. We just got a Costco membership from my parents and went on Saturday. First, OMG what complete madness. Families had multiple overflowing carts and weren't afraid to use them to jockey for position in the sample line. Second, you have to really pay attention to the unit prices. Some items were half off of the price we typically pay at Fred Meyer and others were about the same. Since we have a small freezer, we had to be somewhat selective about what we got.
I like this Amazon option because Costco doesn't have everything. I reviewed the set up and cancellation looks easy. You get an email before your delivery so you have a window of time to skip the shipment if you need to. Though at the rate I drink green tea I don't think that will be necessary.