Do they have cots to sleep on with layover

No cost unless you rent a pod and buy food

No, but they DO have those pods you can rent to sleep in. They're big enough to contain a couple of drawers, a place to hang your clothes, a mirror and the bed. You'd keep your luggage with you I no longer remember the rates, but I recall thinking the prices were reasonable for people who didn't want to sleep sitting on chairs for several hours.