Designed for both form and function, our French Press is made of borosilicate glass, known as lab glass, to keep your coffee hot long after brew time. The handle is designed to match our mugs, for an extra touch of harmony. One of the best ways to preserve the flavor and nutrition of the beans, French pressed coffee is a favorite brew method among the coffee-obsessed. What’s in it: Borosilicate glass, stainless steel, and a plastic seal (where the glass meets the steel lid). What’s not in it: Lead. It’s all good: This product is lead-free. Directions: Please do not microwave this product.