The Moderna range of open litter trays are designed for cats who don't like to use a hooded tray. The Aristotray has a specially designed rim around the edge of the tray, which helps to reduce mess caused by your cat's natural desire to tread litter. Made from a durable plastic, it comes in two sizes in a wide range of colours, the Moderna open Aristotray litter trays provide your cat a safe and mess-free place to use as a toilet.