No more mess with Savic Maxi Bag it Up Litter Tray Bags. (12 Bags) The idea is that they fit over your litter tray and you secure them by affixing your litter tray’s lid. Fill with litter as usual and when your cat has finished using the tray, simply lift the lid and curl up the corners of the bag to form a parcel for the waste bin. This size will fit a tray of maximum size 55x43cm