Illegal. According to the information in the Civil Code, it is illegal to sell Maotai bottle caps of this company on suspicion of trademark infringement. It is forbidden to impersonate other people's trademarks, enterprise names and commodity names. Moutai is a wine in China, and its trademark and name are protected by law. Moreover, publicity and sales in the name of Maotai wine bottles constitute infringement of trademark rights and are regarded as illegal acts.