The Flask by ethoz delivers a clean, refined 17 fl oz of coffee or tea. The inner brewing chamber allows for full immersion brewing without the mess. Simply add coffee or tea into the chamber, add near boiling water, wait 3-4 mins and press. The one-way brew valve prevents over extraction and the removable brewing chamber base allows for fast easy clean up.
The inner chamber is made of Tritan. Tritan is a BPA-free plastic — it is not manufactured with bisphenol A (BPA) or other bisphenol compounds, such as bisphenol S (BPS). Tritan is impact-resistant — products can be used without fear of shattering. ... Tritan is much lighter than glass — making it easier to handle without the fear of breaking.