Case C-543/21, Verband Sozialer Wettbewerb (Containers on which a deposit is charged): Judgment of the Court (Third Chamber) of 29 June 2023 (request for a preliminary ruling from the Bundesgerichtshof — Germany) — Verband Sozialer Wettbewerb eV v famila-Handelsmarkt Kiel GmbH & Co. KG (Reference for a preliminary ruling — Consumer protection — Indication of the prices of products — Directive 98/6/EC — Article 2(a) — Concept of ‘selling price’ — Products sold in returnable containers — National legislation requiring the amount of the deposit to be indicated separately from the selling price)