Steel cup and rod held by cork in aluminum cap, length 35 cm. and diameter of cap 90 mm. cup 18 mm. A deflagrating spoon is a specialized tool used in chemistry labs for safely burning or heating small amounts of substances, particularly those that produce a vigorous reaction when exposed to heat or flame. These spoons are essential for conducting experiments that involve combustion, allowing for precise control and minimizing the risk of accidents. Here's an in-depth look at deflagrating spoons and their importance in a chemistry lab.