Red bull is an energy drink from Thailand that famous worldwide. You've seen it in the usually silver cans, but in Thailand it's sold in small bottles. In the picture Red-bull is in the center, and because it was so successful many imitators have sprung up, a selection of which I've photographed.
We have berries in Thailand that are stimulants (similar to coffee) and these herbs and berries are frequently used in energy drinks. Older Thais chew a nut that makes their teeth black, which contains a similar active ingredient. I'll try to find some to photograph.