Maxipot Twistpot Pot, 13"A revolutionary new patented plant pot, and tray which incorporates an adjustable drainage system which allows water to drain and air to circulate promoting healthy more productive plants. Twistpot allows excellent drainage and air circulation to your roots, meaning they can now flourish and thrive, as they will not experience problems like root rot and the build up of bad bacteria's which are caused by compost remaining moist and starting to sour,