A crate earns its place by being easy to put away. The ones that end up staying up permanently are the ones that are a fight to collapse, and at that point a crate has stopped being a tool and become furniture — so the fold-flat mechanism matters more than almost anything else on the specification.

This is the large size: 91cm long, 56cm wide and 63cm high once it is up. It folds flat without tools, and there is a door on the front and a second on the side, so it can sit against a wall either way round and still open into the room. The base is a slide-in plastic tray you pull out to clean rather than tipping the whole crate over a bin, both doors have slide-bolt latches, and there is a carry handle on the top.

• 91cm long, 56cm wide, 63cm high assembled
• Folds flat in seconds, no tools needed
• Doors on both the front and the side
• Removable slide-in plastic tray
• Slide-bolt latches on both doors
• Carry handle on top

On choosing the size. 91cm is the crate, not the dog. A dog needs to stand up, turn round and lie out flat in it, and the way to size one is to measure your dog standing — nose to the base of the tail — and leave room on top, rather than going by breed. Best Pets publish no weight or breed guidance against these sizes to us, so if your dog falls between two, go up. And it is a wire crate: it is for crate training and safe containment, not somewhere to shut a dog who panics in one.

Who it's for: puppy owners crate training, anyone who needs a dog safely contained in the car or the house, and people short enough on space that it has to fold away between uses.