Sauce bottle tab doing it's own thing

A piece of plastic from their sauce bottle fell into my food, unbeknown to me.

After chewing on it, I took it out my mouth and realized it was a piece of plastic.

Manager arrived. I showed the piece of plastic Response "oh, it is from the plastic sauce bottle which I asked the waiters to remove once the seal is broken". Appeared an incident like this happened prior to my incident?

I was not happy with this excuse and pointed out the safety risk of this.

Then I received an apology and a free milkshake.

So note that the sauce bottles are a risk.