Has anyone notice the specs or particles inside the bottle of Kirkland bottled Diet Green Tea with Citrus?

I just noticed the specs or particles I haven't noticed before in the Kirkland Green Tea with Citrus. I'm wondering if this has something to do with the aged soda. The expiration states it's Best By 04/09/11. I thought this just some of the ingridients that appears visible after the soda is stored overtime. I'm not sure all this, does anyone knows?