Forget Earl grey. How about Earl Great White? Daisho Fishery Company’s awesome shark tea bags sit in your mug and make the water blood red.
The Great White Shark is filled with a rosehip and hibiscus tea that makes the water red, while the whale shark version is filled with green tea. They have a little scuba diver to keep the bag from falling in irretrievably.
These cool tea bags are currently in the crowdfunding phase in Japan, and you can learn more here. I wish we could get stuff like this over here in the US.