The 18 Litre was developed from the 12 Litre and made longer specifically for the rock and surf angler who wants to carry big, long baits such as chokka and bonnies for sliding. The fisherman boxes have a non absorbent HDPE plastic lid. The nylon construction is hardier than ever which is great when preparing such baits as chokka with the use of a mallet. The seal of these new lids has been extensively tested at our factory and we are pleased to say that there is no difference whatsoever in terms of temperature variation between the full nylon and fibre glass lids.