Exactly how long should a slab of toffee liquorice last? Just asking for ......ME. Boy this stuff is nice! Walkers got it right when they put liquorice into a slab, making it the only way, when I give some to all the family, I can get to watch a film without all the background noise; well quite a bit of slurping, but I'll put up with that. Top taste with that eating challenge we all enjoy.