That's why I bought this ball for a split pot. So I can test loose tea and not fallen in, it was not too much money.
The shutter is very easy to spin. So far it does not stuck with me. In the first loose tea (Chai) 25 grams have passed (for a pot = 1 liter) Just to the edge of the lower closure part. On the other tea, which occupies more space at 25 grams (with lighter ingredients) will probably not fit in the ball. But but you can not really pull off a star.