TUBO is a handy bottle for tea brewing and preserving. Air-tight sealing structure enables you to carry it along and brew anywhere anytime.

Tailored for cold brew: TUBO is a daily drinking glass as well as a tea infuser. (up to 60mL glass tea container)
Air-tight seal: Simple physics!
Atmospheric pressure is a very reliable alternative of  traditional thread locking.
Easy brewing: Flip the bottle up-side- down to brew, and turn back to halt the brewing process.
Easy cleaning: Truly no dead corner .