Most movers won’t carry live plants due to the high probability they won’t make it unattended and without sunlight. Gasoline cans and other volatile or toxic chemicals are also prohibited and should be safely disposed of ahead of time.
Safer liquids should have their lids taped shut, and the boxes they’re stored in should be properly labeled. While not necessarily prohibited, it’s prudent to transport valuable or important personal items like jewelry or medications on your own.