Design Letters personal cup eco is made of ecozen which is a BPS, BPA and phthalate-free bioplastic. The recyclable material is made from biologically produced raw materials, which makes the cup a very durable and environmentally friendly alternative. The cup's design was developed by Tobias Jacobsen and is available in different letters designed by Arne Jacobsen. The cup is perfect as a juice glass and as a coffee cup and also makes for a nice pen holder on a desk. Combine several letters to create different words or names.