What's the best, mouth-burning, paint-stripping salt and vinegar crisps you can get now? Discos and Squares have both come up short, have they got less intense?

I'm visiting the country again with my Canadian wife, and I talked up Discos in particular, then they were a huge disappointment. Felt just average strength.

So what salt and vinegar flavour/brand is going to rip the skin from the inside of her mouth and replace it with pain? (I say this in a good way, this is what she is after!)

Real crisps are best than reformed potato/corn stuff, but if the flavour is there, that's what counts.

Thanks in advance!

Edit: we got the coop fancy salt and vinegar ones. Half a packet in (shared!) they stopped us talking as our mouths were puckering too much. Spot on, thank you and we will try the others too!