I want to install two shelves in my pantry to house my spice jars which will be placed horizontally like the ones in the left side of the attached photograph. The width of the shelving only needs to be 10cm deep and the width of the length of the wall is 100cm. I would like two shelves placed from the top of the wall, so this leaves plenty of room underneath for other things. What type of wall do I need and what type of supports?