the cool new hot

Hot and Cool practically mean the same thing. Why is that? You can say about an item that you like, "hey, that is cool," or "try out this cool new...." Now hot is used in more of an exclaimitive way as in "that's hot!" but I have read the beckon "try our hot new..." before. So you can have your hot new toy and I will get my cool new toy and it can still be the same thing. Maybe it is seasonal? What then would you get in the summer? Summer is hot so it could be 'hot new' however because it is hot you might want to get 'cool new'. But I think that winter always gets 'hot new' I am not sure that anybody is interested in 'cool new' in the winter season. And I have no idea what goes on in the spring and autumn.