Guys, my brother has a juice called subzero by halo e-liquid which is the most menthol juice I have ever tasted. I'm trying to replicate this with making a high "cool/menthol" effect juice. I've bought the koolada and waiting for that but I've noticed VRU sells a menthol concentrate again. I thought that the whole point of menthol is to give a cool throat hit so what's the difference between menthol and koolada? And which one has the most cool throat hit?