The main objective of thesis was to find out whether reusable plastic cups are economically and ecologically more advantageous than single-use plastic cups. The partial objectives were then to research the level of satisfaction of reusable plastic cup users. Moreover, whether the users of reusable plastic cups have an interest to buy a new product within reusable sector. The theoretical part then describes plastic issues in Europe, functionality of reusable plastic cups, and further mentions companies who make reusable plastic cups. The practical part aimed to analyse the system of reusable plastic cups on a particular example. Furthermore, there was conducted a survey of user satisfaction with reusable plastic cups. And finally, the potential interest of customers about a new product was researched.