Unlike most other fine strainers, the Coco Strainer was designed specifically for cocktails and has slighter larger holes in its mesh than is typical of...
I know this is a highly regarded strainer but I find the mesh a little too large. If I make a Southside, for example, I end up with a few flecks of mint leaf in the final cocktail.
I much prefer the larger mesh but for the rare instance with ingredients like mint, I suggest using two strainers held together with a finer strainer on the outside.