It is very tempting to join discount wholesalers' clubs such as Sam's Club, etc.  Most of the bulk items are cheaper and more eco-friendly because of the bulk packaging.  However, unless you are feeding an army of people at home.  You wind up wasting alot of the food.  So a great simple solution is to join a friend and decide in advance which bulk items can be split and shared between families.  The following are great items that can easily be shared (and divided into smaller portions).  Just remember to keep and reuse your regular sized bottles/containers so that you can transfer the bulk items into them.

- ketchup
- mayonnaise
- other condiments
- cheese
- fruit (e.g. bananas, strawberries, grapes, oranges, lemons, apples and other fruits are usually sold in bulk packages)
- vegetables (frozen or fresh)
- meat (e.g. easy to split packages of chicken dumpsticks, porkchops, steaks and chicken breasts)
- fruit juices (e.g. easy to split the double gallons of juice that are packaged together or to pour them to smaller individually sized containers)

The following are less common items that are shared/split but you can still do so:

- packs of batteries (the price is cheaper in large packages but who really needs all those batteries)
- packs of socks (kids grow out of their shoes sizes quickly so split the package with friends who have similar aged kids)
- packs of toilet paper/tissue paper