Most litter problems start with a tray that is too small. A cat should be able to turn a full circle, dig properly and cover what they have done without their back end hanging over the edge, and a cramped tray is one of the commonest reasons a cat quietly starts going somewhere else in the house. Both sizes here are generous, and the open design puts nothing between a cat and using it.

There is nothing clever going on: a single piece of sturdy moulded plastic with rounded internal corners, which is exactly what you want when you are scraping a tray out twice a day. No seams to trap waste, no hood to lift off, no filter to replace. Wash it with hot water and unscented soap rather than anything strongly perfumed, since disinfectant smells are another thing that sends a fussy cat looking for a quieter spot.

• Large size 51 x 35 x 13 cm
• XLarge size 58 x 39 x 17 cm
• One-piece sturdy plastic, open top
• Rounded corners, wipes and rinses out easily
• Colours are assorted and picked at random
• No scoop included

Two things worth knowing. The colour is chosen at random from the assortment, so your tray may not match the photograph. If a particular colour matters to you, this is not the one to order. And the rule for households is one tray per cat plus one spare, kept in separate quiet places, which prevents more accidents than any single tray ever will.

Who it's for: Households wanting a plain, roomy, easily cleaned tray, including larger cats such as Maine Coons and Norwegian Forest Cats who outgrow standard sizes.