It's a sight to behold while you're brewing. That's why Espro built the P5 so that everyone can observe the ESPRO Press in action. The P5 perfects the traditional finesse of a traditional glass French press through design and technology. Simply explained, compared to other glass presses on the market, the P5 is safer, more robust, and keeps beverages warmer. They invented a patent-pending Safety Lock™ to completely secure the glass inside the steel cage, and finally eliminate the industry’s issue of glass slipping out while pouring. They designed the German-made Schott Duran® glass to be 40% thicker than a traditional press. And they included our patented double micro-filter for a clean, delicious cup with none of the typical grit and mess. Tea filter not included.