One of the worst things that could happen to your package when it gets delivered to your home is to find out that its contents are all jumbled up, with some others completely destroyed. I was unfortunate to experience that twice, both under the same shipping firm. I am unsure if it was really the courier's fault during both instances. What I am sure of is that it made a mess in my package. It was a package full of detergent liquids and some food supplies. It was sent via sea, so it took a long time before it reached my place, and when it did, I found that the detergent bottles were forced open due to heavy weight. So you can already imagine what happened with all the food inside. They all smelled like some cleaning liquid.You could probably reprimand the courier but, personally, I won't bother. The best cure is always prevention. I will still suggest that when you have something delivered, make sure that the package does not include any bottle of some sort that can easily open. That way, you are 100% sure that no liquid will spread.
In the unfortunate case wherein you really have to have some bottles of liquid shipped, than require the sender to make sure that the liquid is in a bottle that won't easily open. Wrap it around with a lot of packaging tape and some towels before finally putting it inside your cargo. There is no 100% assurance that the liquid won't spread, but it surely lessens the risk. Being careful certainly goes a long way.