We'll provide you instructions on making a dumbbell set out of empty soda bottles. The bonus to this set is that you can adjust the weight by adding or subtracting contents from the bottles.
2 Liter Soda Bottle x2
1" diameter PVC pipe - 7" long - x2
1" diameter PVC pipe - 8" long - x1
1" PVC coupler- x2
Black spray paint (optional)
Hot glue gun