Pest Control Research sells a full range of bait stations with capacities ranging from 20g to 2000g. Bait stations serve many purposes such as the following.
They help prevent non-target species from accessing the bait.
They protect bait from the rain so that the bait lasts longer.
When filled with non-toxic bait, such as Prefeed Plus, they train possums to visit the site on a nightly basis.
Once the animals are trained to vist the site they can be poisoned by filling the bait station with poison bait. Alternatively the animal can be trapped by placing leg-hold traps or kill-traps near the bait station.