Take 3 terracotta pots (Pot A, B and C) and drill holes (1 inch diameter) on the sides. These will be used for air circulation.
Also make large holes (3 inch diameter) on the base of 2 of the pots (Pot A and B). These holes will be used to drain leechate. Make sure you leave the third pot without hole in the bottom. This pot will be the bottom most pot.