Holes in the base prevent your plants from becoming water logged.
 

Rolled top edge prevents any cut fingers. 

These pots are really strong so you can use them year after year. 

Available in four sizes:
6" diameter x 5" deep (15cm x 14cm), capacity 1.8 litres.
8" diameter x 7" deep (21cm x 18cm), capacity 4.3 litres.
10" diameter x 9" deep (25cm x 24cm), capacity 6.2 litres.
12" diameter x 11" deep (30.5cm x 29cm), capacity 11 litres.