- The first known patent for at French press was filed in 1852 by two French inventors, Mayer and Delforge.
- In tests, we found that the temperature of a brew prepared in a French press made of vacuum-insulated steel declined at the slowest rate. Next-slowest was acrylic plastic; of all the French presses we tested, Pyrex glass lost its heat the most quickly.
- Immersion brews lose their heat more slowly than pour-overs.