Although sustainable change is urgently needed, more environmentally friendly alternatives are often rejected when it comes to handling and selecting products. This also applies to people with a sustainable attitude. Accordingly, the question arises as to whether and under what circumstances a sustainable attitude actually leads to sustainable product-related behavior. This basic problem is addressed here using the example of light switches made of PCR plastics, with a particular focus on the relationship between ecological sustainability attitudes and purchase intention and willingness to pay. The experimental study was conducted in a single-factorial between-person study design with n=87 test subjects. A light switch made of PCR plastic attached to a pillar served as the stimulus material. In the survey, sustainability attitudes, purchase intention and willingness to pay in particular were recorded using a questionnaire. The results of the survey revealed only a weak correlation between the attitude towards sustainability and the purchase intention, but no correlation between the attitude towards sustainability and the willingness to pay. These results indicate that the target group-specific use of PCR plastic for groups with a sustainable attitude to household appliances only makes limited sense.