This is a test of commonsense. Complete the next sentence:

How to get rid of garden slugs
Use beer or milk traps for important plants.
Slugs will only notice these traps from a few feet (about a meter) away, so this is best used for small gardens or important areas. Set these up as follows :
Bury a tall cup with steep sides into the soil.
Leave the rim inch (1.25 cm) above the soil, to prevent the trap killing beetles that hunt slugs. Fill the cup halfway with beer or milk.