Unlike most French Presses, ESPRO uses two micro-mesh filters to strain your coffee grounds, resulting in smoother, grit-free coffee. A silicone lip lines the dual micro-mesh filters to create a tight seal when you press the plunger down. This seal dramatically slows down extraction of your coffee —so your brew doesn't get bitter over time. Our unique, patented technology works in harmony to streamline the brewing process, making it easy to brew café-worthy coffee in just four minutes at home. When it comes to combining the aesthetic elegance of French pressed coffee with durable yet affordable materials there's no better duo than Schott-Duran German-made glass and premium stainless steel. that is BPA, BPS, & Phthalate free. Pour-over, oil-free tasting coffee or flavorful tea has never been easier to achieve at home than when you add a paper filter to your ESPRO French press brewer between the dual micro-mesh filters. Pssst, ESPRO's paper filters are sold separately and compostable!