Glass, stainless steel, PP with wood fiber and silicone. A lightweight 25 fl. oz. Borosilicate glass bowl with a protective and insulating (keep cool) sustainably sourced wood fibre base and stainless steel lid. 100% leak proof. Microwave safe, including wood fibre base for easy handling when hot (*not stainless steel lid). Oven safe glass and silicone lid (*not wood fibre base). Top rack dishwasher safe. BPA free. Packaged in Black+Blum retail gift box. Black+Blum are proud members of 1% for the planet and donate one percent of their total annual sales (including this item) to non-profit environmental causes.