The holes are big enough to let the tea (except for the large leaves) so a lot of deposit into the cup.
Moreover the silicone is very (too) so the flexible lower part does not close very well, there is a risk of opening if the tea is too heavy.
However the size is correct in order to balance the tea as desired and maintenance is very easy, no tea residue remains.
Overall disappointed with this article, I will turn to a rigid model in stainless steel.