A highly decorative piece, and a rare and interesting example of Algerian Kabyle pottery. 
 
I have noted whilst researching, other simarlarly decorated items can be found in the Victoria and Albert museum, London.  See link (https://collections.vam.ac.uk/item/O163952/vessel-unknown/).
 
The construction and design are typical of the Kabyles people. The clay was shaped by hand using the thumb and coiling methods. Before firing, the vessel was decorated with kaolin, coloured oxides and slips (liquid clay), usually in blocks of red and white overlaid by geometric designs applied in black. Pots not intended for use in cooking, like this one, also had a resin applied to give a glazed surface. This gave a yellow colour and ensured that the pot was watertight.