As a fly fisherman, this is one of my personal favorites. Fish on a flask... you can't go wrong.
We tried out this new design for the Green River Festival this year, a music festival in Western Mass thats been going on for 20 years now, bringing people from all paths and interests together for an awesome weekend of fun. It was our third outing together selling our new wares, and I can say we had a really sweet time. However, I cannot verify that this flask stayed empty for the duration of the festival :)