A sign of more things to come! My set of three swirl vases which I've since found out are 3-D printed thermoplastic. They're really lightweight. Apparently according to the designer/maker
https://www.etsy.com/uk/shop/Vantage3DPrints?ref=l2-about-shopname they are made using a biodegradable plastic made from cornstarch "PLA". Incredible stuff!
