Sasha Shipping companies always recommend being very specific in customs declarations. Then there are packages from China where the declaration may as well be word salad.
I remember some stories where a bunch of researchers were gathering tons of data in the Colombian rainforest and, because internet connections were not good at that time, especially not anywhere near the remote areas the researchers were working in, they decided to ship the data home on hard drives.
Customs saw metal boxes from Colombia that did not reveal much of their contents on X-ray. So they decided to... cut those boxes open to see if there were drugs inside.