Answer:
Gumby and yoga instructors have this in common.
A
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
I travel the world and I am drunk constantly. Who am I?
What cannot talk but will always reply when spoken to?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.