In order to improve particularly the ease of discharge of product residue in containers, such as pharmaceutical packaging means, the invention provides to equip corresponding substrates with a hydrophobic coating. For this purpose, a composite material is provided comprising a substrate and a coating deposited thereon, which forms at least part of the surface of the coated substrate, wherein the coating comprises a compound having the elements C, O, and H, wherein further elements, except Si, C, H, have a content of less than 10 at%, preferably less than 5 at%, and wherein the compound comprises a composition of SiOxCyHz, wherein x is a maximum of 1.2.