10 Weird Coffee Drinks

1Egg Coffee

Cà Phê Tr?ng, or Vietnamese egg coffee, is served in cafes throughout Hanoi.

Egg yolk and condensed milk are whipped together until thick and creamy; then black Vietnamese coffee is poured over the top and left to sink to the bottom. It is said to taste like silky coffee-flavored custard.

2Coffee with Sea Salt

The chefs at Taiwan's top coffeehouse, 85C Bakery Cafe, serve sea-salt coffee, which became their best-selling drink following its December 2008 debut.

According to 85C spokeswoman Kathy Chung, it was the Taiwanese habit of sprinkling salt on fruits like pineapple and watermelon to bring out their sweetness that convinced the company to try it with coffee. The unusual concoction also makes sense in a place where shaved-ice desserts are topped with corn kernels and the bread gets slathered with sugary frosting and bits of pork. "Taiwanese are greedy," explains graphic designer Xena Wang, one of six friends who recently tried the drink for the first time. "We like to get all the tastes we can in one bite."

3Coffee with Tonic

While tonic and coffee might seem like an odd pairing, the combination has risen in popularity in the specialty coffee world, providing a refreshing, caffeinated kick to drinkers in search for something a little different than just a regular cup of coffee or espresso. It's as simple as an espresso poured into a glass with tonic water and ice.

Credit for originating the drink is often given to Swedish roaster Koppi, who has been serving their Kaffe Tonic for several years now, but these days you can it at many specialty cafes around the world.

4Coffee with Butter and Oil

People are putting butter (and oil) in their coffee. Bulletproof Coffee, the company behind the popular trend, is claiming that drinking a mug of the stuff instead of eating breakfast is a secret shortcut to weight loss and mental superpowers, and now the butter coffee has developed a cult of highly caffeinated, shiny-lipped adherents.

But does it work? Dr. Andrew Weil pointed out that buttered coffee is a common drink in some parts of the world – and Bulletproof coffee merely adds another relatively healthy fat to the mix. If you're active and eat a balanced, nutritious diet, adding a little fat in Bulletproof coffee is perfectly acceptable, and might give you a bit more energy than your usual cup.

5Coffee with Cheese

Kaffeost is a Swedish tradition of dipping cheese into coffee or drinking coffee with the cheese already in it. The cheese, known as Leipäjuusto, is found in Finland and northern Sweden and is made from the milk of cows, goats or reindeer.

6Coffee with Lemon Or Lime

Like your coffee a little tart? Try Guillermo — coffee with lime that can be served either hot or cold, or Espresso Romano served with a fresh lemon peel. But we need to forewarn you — these drinks are not for everybody. The acidity in both is very high.

7Nitrogen Infused Coffee

Can science build a better coffee? Nate Armbrust, a food scientist at Stumptown Coffee Roasters in Portland, Oregon, thinks so. He wanted to figure out how to infuse cold-brewed coffee with tiny bubbles that would make it rich and creamy without sacrificing its flavor. So, he decided to try pumping nitrogen gas into the brew.

It worked. After a few months of playing around with the right balance of bubble infusion, his nitrogen-infused cold coffee became creamier and richer than regular old cold brew and was an instant hit after putting it on tap at his Portland cafe. Nitrogen gas doesn't easily dissolve in water, but givings the brew a thicker, more velvety "mouthfeel."

8The Tim Tam Slam

While virtually unheard of in other parts of the world, The Tim Tam Slam is an Australian coffee ritual.

The method is simple:

First, have your hot coffee ready in front of you. Then bite off each end of the Tim Tam (A Tim Tam is chocolate covered biscuit with a cream-filled center that is native to Australia, but you can find something similar in your country.) Next, place one bitten end of the Tim Tam in your mouth and dip the other bitten end into your java. Now suck, using the Tim Tam as a straw. As the hot drink is pulled through the biscuit, the structure of the biscuit and cream collapses.

9Coffee with Vanilla Coke

It's been 20+ years since Quentin Tarantino's classic Pulp Fiction hit the big screen. Its main character, Vincent Vega — played by John Travolta, who drinks vanilla Coke — continues to have a life of his own at The Mission's three restaurant locations. The Vincent Vega — a mixture of Coca-Cola, an espresso shot, Torani vanilla syrup and ice — has a lot of diehard fans. Clearly, caffeine-spiked caffeine isn't for everyone, but the buzz you'll get from this drink is 100% guaranteed.

10Espresso and Beer

Houndstooth in Austin, Texas wants you to hang out for a while, which is why they created Coffee Beer Repeat, which consists of two shots of espresso and two pints of beer. You can get them in any order you want and space them out over a period of time. Sharing is encouraged!