I have already a dry bag but I need a zip lock style of bag to keep car keys, phone and wallet dry with the assurance the thing won't leak. Recently I met someone in a hike that had one of those bags which looked great, a bit like a toiletry bag feel but clearly made for people into canyoning/kayaking. It was very solid, with a tough zip system and highly foldable. I made the mistake of not asking where they purchased the bag from; now I'm having trouble finding one like that (or a similar one).
Any personal recommendations?