Our bamboo saucers are made of sustainable bamboo fibre, rice starch and resin from naturally occurring organic compounds.No there is no petroleum-based plastics and BPA in these saucers, making them biodegradable, compostable and able to last up to 5 years or more. They can be used indoors and outdoors.A composting process using these saucers may take 6–12 months, but breaking the products into smaller pieces before adding them to your compost heap will help speed up the process.Both the 8? Pots and Saucers are also available in a traditional terracotta colour.