"Tiny foreign particles" can you please elaborate a bit more regarding the size?
What product are you talking about, in beverage juices have fibres and many other products like coconut water is no good without the coconut pulp. I assume you are filling clear liquid.
CSD or still beverages? Alcoholic or non alcoholic ?
What foreign particles are these ? Rubber based, pieces of sugar, stone, metal?
How are you finding these contaminants? X-ray inspection on line or by any other inspection method, in lab during testing? Customer complaints?
Request you to provide more details so that I can be of some help?