In particular embodiments of the locking clip 46, the elongated body portion 48 is provided with the length needed for the locking end 56 of the locking clip 46 to extend beyond the lid 4 and allow the lid to be locked through the locking aperture 58 with a padlock, pin or other locking mechanism, but not so long as to prevent the lid 4 from opening when the locking clip is in place.