Don't sweat it, the USDA and FDA allow a maximum 2% pus content in all pasturized milk products

they also allow bug parts and rat hair in foods

The FDA allows up to 2% filth content, so long as it's "incidental" and not like radioactive or something. If a company really wanted to g̶o̶ ̶o̶u̶t̶ ̶o̶f̶ ̶b̶u̶s̶i̶n̶e̶s̶s̶ be progressive, they could itemize recognized filth under the "contains 2% or less of" part of the ingredient panel. Or at least declare "may contain traces of rat feces, fly carcasses, human urine and a glove someone dropped into one of the processing vats". In some cases the "filth" may be the most nutritious part off the food!

Do you mean Strawberry milk?

Nah, that's just milk cut with red icee syrup to save money. They'd make more of it but there's limited demand for a product even more disgusting than milk contaminated with cow pus.