The collaboration is based on selling goods and services to each other - and hence to each other's clients - and cooperating in marketing efforts. He has not chosen his partners based on pre-defined sustainability criteria, but has refused cooperation on non-sustainability grounds. He works together with another small local company, who offers visitors bus transport on the island. The company 62° N, a travel agency with 50 years of experience, is also a partner to Lakeside Excursions.