Ecovacs DEEBOT X11 OmniCyclone

It empties into a 1.6 L bag and holds 3.2 L of clean and 2.7 L of dirty water, and it cleans its own base, though the smaller bag fills sooner than larger docks.

The robot is 3.9 inches tall, so it slides under most sofas and cabinets, though very low furniture may be tight.

It clears obstacles up to 40 mm, so it handles most door sills and transition strips between rooms.

Yes. The dock automatically dispenses detergent when washing the mop and refills the robot from a 3.2 L clean tank.