So like my mom makes an extra effort for us to eat healthy, and yogurt has lots of probiotics, so we buy kefir (yogurt drink,, loaded with probiotics)
So a few years ago, i got myself a cup of it and put it on the table after drinking some.
Now, of course, we;re a family of five, so the tables bound to be cluttered to some degree most of the time, so there are multiple cups on the table.
I come back after a bit, get my cup off kefir, and take a giant gulp
SOMETHING IS IMMEDIATELY WRONG, IT'S SOUR AND TASTES WRONG
I run over to the sink and spit it out, after a bit of thoroughly spitting and washing my mouth i go back over to the table and look into the cup
It;s a cup, that looked identical to my cup, except instead of a probiotic yogurt drink there is an inconsistent yellow liquid inside, with a flat white chunk on the top
I smell it, it smells like rotten milk, it looks like rotten milk, im horrified.
I poured the rotten milk into the sink and for a long time i didnt feel comfortable drinking from those cups