Legal analysis: Consumers have the right to decide whether to buy drinks from catering enterprises. Operators use statements, store notices and other forms to prohibit consumers from bringing their own drinks, and they can only buy drinks that are several times higher than the market price in the store, which infringes on consumers' independent choice and fair trade rights.

Legal basis: Law of the People's Republic of China on the Protection of Consumers' Rights and Interests

Article 11 Consumers have the right to fair trade. When purchasing goods or receiving services, consumers have the right to obtain fair trading conditions such as quality assurance, reasonable price and correct measurement, and have the right to refuse the compulsory trading behavior of operators.

article 26 when using standard clauses in business activities, business operators should draw consumers' attention to the quantity and quality of goods or services, price or expenses, time limit and method of performance, safety precautions and risk warning, after-sales service, civil liability and other matters of great interest to consumers, and explain them according to consumers' requirements. Operators are not allowed to make unfair and unreasonable provisions to consumers, such as excluding or restricting consumers' rights, reducing or exempting operators' responsibilities, and aggravating consumers' responsibilities, by means of standard terms, notices, statements, shop notices, etc., and are not allowed to use standard terms and use technical means to force transactions. Format clauses, notices, statements, shop notices, etc. contain the contents listed in the preceding paragraph, and their contents are invalid.