Dinosaur Designs homewares are suitable for cold food only. These pieces should be hand washed in warm water. Resin may appear frosted after washing and should be rubbed with a drop of cooking oil to restore sheen. All resin pieces are strong and durable but should be treated like a ceramic and are not shock-absorbent and can break if dropped or knocked against a hard surface. Resin is not fire resistant and so should not be used in an oven, a microwave, or used as candleholders or ashtrays.