Purchasing a complete set of free weights from your local big box or sporting goods store could empty out your pockets. For those interested in recycling, working out and saving money, the answer may be found in their old empty milk cartons.
After you've finished a jug of calcium-filled milk, save the empty carton. Wash it out and then fill it with any number of substances to create your own personalized set of free weights. Water is commonly used, although other materials like sand would work as well [source: Charlebois]. You can use any size milk jug, although a gallon size would allow you more versatility as it's the largest.
Not only could this save you money from purchasing expensive free weight sets, but just one or two jugs can provide you with a complete set. Since you can add or pour out whatever substance you've been filling it with, you can change the weight whenever you want.
Once you've filled your milk jug to your desired weight, grab the handle and perform any of the exercises you would usually do with free weights.
There are plenty of options for making use of your leftover milk cartons. If you want more information and ideas, be sure to check out the links on the next page.