Yes & no! Polypropylene is very durable & hence that is why it is used in many industrial, agricultural & food processing & production applications. It is made to withstand the knocks of everyday life. However if you take to it with a hammer or drop it from 3 metres high, especially if its full of product then, yes, it will crack or break. UV attacks plastic & over time can make it go brittle. To counter this we add a UV stabiliser to our products to negate the effects of this.