Why are coffee grounds found in some cups of coffee? It can't be the brand of K-Cups because it happens with all the brands.
I shook my K Cup prior to brewing it... don't know why, but if there is a filter at the bottom of them that would explain why I got grounds in my cup. Perhaps people are shaking them without even thinking about it. I also get my K's from a web site called "stock buggy". They seem to have the lowest pricing and if you spend enough money you get a discount and free shipping.
Actually it's suggested that you DO shake the cup as the grounds can get packed after being left on the shelf for so long and a shake will loosen everything up so that you get a better brew. If the filter inside is properly attached, shaking it should not matter at all.