Engineered by a team of crack Scienticians, we designed the BRCC dripper to fit in your favorite double-walled tumbler. And when we say "we', we mean a joint collaboration between NASA, DARPA, and Hobby Lobby.

Features: 

• Made in the USA with BPA-free Tritan plastic.
• Fits perfectly on our Yeti & Big Frig tumblers.
• Compatible with the Collapsible Pour Over Filters.