Old newspaper is used to make new paper for printing or it is used in making roof and felt paper for the construction industry. Cardboard boxes are recycled to make new cardboard paper.
White and colored office paper is used to strengthen other paper materials (like cardboard) and also used to make new office paper. Plastic bottles are cleaned and re-grinded into granules and made into various products of household / industrial use and new plastic containers (though never food containers).
Aluminium is melted down and used to make new aluminium products.
Metal containers or steel are melted down and used to make new steel products.Glass bottles are reused or crushed and used for road fill, or cullet to make new glass products.