Vinegar Bottles

Bottles like this can be refilled.
Boil about 30mm of water in a  saucepan, hold the bottle upside down in the water for a couple of minutes.
When the plastic has softened, the cap can be pulled off if you wear a thick glove.

is that vinegar or a sauce?

That is vinegar but it works on sauce bottles as well.

how very saucy - so you can then put in your vinegar or sauce of choice I assume or would you be breaching copyright laws??

Yes I like to to reuse the vinegar from my pickled onion jars but my friend prefers the straight vinegar.
We now have two bottles but can't remember which is which!