I really like redbull, but it costs almost 2,5 dollars per can here in Sweden.
Fortunately there is one called Power King that is even better and costs about half a dollar. That is awesome!
You can get Red Bull from Thailand, it's called Krateingdeing or something. It's in little glass concentrate bottles and has 100mg caffiene in each. Two of these gets you buzzing and they are only NZ$1 each from a store called Davis Trading here in New Zealand.