Can you use soda bottles instead of dumbbells?

I have weekly exercises, and I am on my week 2, and it requires 2x 5 pound dumbbells (5 pound each). I don't have those, but I heard that I can use soda bottles, Is it enough with 2 liter bottle each instead of 5 pounds dumbbells? any tips?
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+1 y
Seriously, it's not about how or expensive it is, Its just that I were too lazy to buy these.
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+1 y
How cheap or expensive *
Can you use soda bottles instead of dumbbells?
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