Koolada is a strange... but nicely so.... additive. I use it extensively for TH but not coolness. (I use menthol for that.) Have you ever put your hand in water that's either so cold it feels hot or, worse, so hot it feels cold? That's how Koolada works. Under a certain level it will be "cool" as they describe it but go over that and its "hot." That's how and why I use it... especially in very low or zero nic juice. If I want that kind of TH and want a cool vape, then I add menthol for the cool.