Opti-Greens 50 is a favorite of our customers. We take it everyday, and sometimes twice daily. After seeing so many people pack their serving of greens in a plastic baggy, we knew we had to step in and help. The #GREENS30 Shaker is the perfect size, 20 oz to be exact, to take with you wherever you go! The funnel also holds one full serving with no issues, and no spills.The combo pack comes with a shaker and a funnel!