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How to make a homemade weight set
Use a milk jug.
Fill a clean, plastic gallon jug with water, sand, rocks, or concrete. Make sure that the jug has a handle; you will use this to complete your exercise reps.
Use the handles to lift and lower the jug like you would any hand weight or dumbbell. With milk jug hand weights, you can do bicep curls, tricep exercises, and shoulder raises.