California Code, Business and Professions Code - BPC § 25501

(a) Furnish, give, rent, lend, or sell, directly or indirectly, any equipment, fixtures, or supplies, other than alcoholic beverages, to any person engaged in operating, owning, or maintaining any on-sale premises where alcoholic beverages are sold for consumption on the premises.  This subdivision shall not prohibit the furnishing of draft beer pumps and iceboxes to those persons who operate on a temporary basis.  Notwithstanding any other provision of this division, a manufacturer, bottler, importer, or wholesaler of products of the brewing industry may furnish, give, rent, lend, or sell, directly or indirectly, paper beverage coasters less than 25 square inches in size and having a value of less than five cents ($0.05) per coaster or brand-identified acrylic table tent holders to any person engaged in operating, owning, or maintaining any on-sale premises where alcoholic beverages are sold for consumption on the premises.

(b) Directly or indirectly, hold the ownership or any interest, by stock ownership or otherwise, in any firm, corporation, partnership, or business, furnishing, supplying, or dealing in any office, store, or restaurant furnishings or equipment, other than signs for interior use or supplies authorized to be given under this division to any person engaged in operating, owning, or maintaining any on-sale premises.

(c) Notwithstanding any provision of this section, the holder of a beer and wine wholesaler's license may manufacture, distribute, and sell any lawful product to any person engaged in operating, owning, or maintaining any on-sale premises where alcoholic beverages are sold for consumption on the premises, provided that these products are sold by the holder of the beer and wine wholesaler's license to the on-sale licensee at a price not less than the current market price for the product.