I am a member of Know Thy Food (www.knowthyfood.com) co-op. We just recently gained access to discounted Ball & Kerr canning supplies that will ship in July.
This is a Portland, OR based co-op, so you’ll want to be local if you decide to join as you have to come in to pick up all orders. The prices are roughly $4 cheaper than Amazon.com on cases of 12 that include lids and labels. There’s also a couple deals on complete starter kits. All other food items, etc. are sourced locally, sustainably, and animal-welfare friendly-ly(?) and can be purchased at wholesale pricing as we do large group orders that are managed online.
The co-op shares space with a small cafe and grocery of the same name. Stop by and check it out! I have only been a member for about 4 weeks now, but it is working out awesome (even though I drive from WA 80minutes to get there).
Know Thy Food
at The Warehouse
3434 SE Milwaukie Ave
Portland, OR 97202