MILWAUKEE, Wis. (CBS 58) -- It’s bright pink, built to move and putting a fresh squeeze on a summer classic. What started with a pink tent has grown into two bright pink school buses, more than 20 flavors, thousands of possible combinations and a social media following of more than 76,000.

Savana Pettis started Lemonade Lab 414 when she was 19 years old after noticing something while attending festivals with her mom around the Milwaukee area.

“I noticed the gap between the lemonade market,” Pettis said. “Traditionally, everybody has their regular lemonade stands, but here at Lemonade Lab, we're different.”

Pettis started the business with a pink tent and a different take on traditional fresh-squeezed lemonade. Customers can choose from more than 20 flavors and mix them together to create their own drinks.

“We have so many different flavors,” Pettis said. “There are thousands and thousands of combinations that you can create yourself. So here at Lemonade Lab, you can make your own creation. That's what's fun.”

The flavors include blue raspberry, strawberry, raspberry, pineapple, guava, coconut, passion fruit, grape, cucumber, mango, peach and more.

“Each time you come, you can get something new,” Pettis said. “It's not something you have to stick with the basic every single time. Do whatever you like.”

With customers constantly coming up with different combinations, Pettis said she sometimes feels like a “mad scientist.”

“I feel like a mad scientist every day,” she said. “Every day people come up with new creations. I have regular customers that come up to the bus, and I'm like, ‘All right, what are we coming up with today?’”

Sometimes it's lemonade, sometimes it's limeade and sometimes it's a combination Pettis hasn't made before.

“Then I make them try it before they leave, and they're like, ‘So good! Like, I will see you next week,’” she said.

One of the newer flavors is blue cotton candy lemonade, which Pettis said has become especially popular.

“We just dropped that one about a year ago, and that one's actually really popular in Florida as well,” Pettis said. “Tastes just like blue cotton candy lemonade, like exactly how you would imagine it.”

At Lemonade Lab's regular locations, the team will sometimes add complimentary cotton candy and candy toppings to the drinks when they aren't too busy.

“We take a chunk of cotton candy and we stick it on top of the drink with some fun candies,” Pettis said.

They don't typically offer the toppings at events because the lines are too long, but Pettis said customers have started asking for them.

“Sometimes at events, people will come, be like, ‘Oh no, there's no cotton candy,’” she said. “We're like, ‘Okay, you got to come to our regular spot,’ and they always end up coming.”

Lemonade Lab has also recently gone bigger with its drink sizes.

“We just introduced our gallon lemonades, so it's a full gallon, like a milk jug, of fresh-squeezed lemonade,” Pettis said.

The buses also offer a 64-ounce size.

“It's a big old tub,” she said. “It's a half gallon of lemonade, and people will look at you crazy when you're drinking it, but Lemonade Lab, you have to.”

The bright pink buses have become a big part of the business, but Pettis said a school bus wasn't part of her original plan.

“Driving around, I just stumbled upon the bus,” she said. “It was never actually in the original business plan to specifically do a school bus. We kind of just stumbled upon it, and it became our thing.”

Now, there are two.

Lemonade Lab recently opened its second bus near 51st Street and Lincoln Avenue. The other is located near 20th Street and College Avenue when it isn't being used at an event.

“You guys were killing us at our first bus,” Pettis said. “We had to open a second one.”

Pettis' boyfriend, Joel Santa Maria, helps with just about every part of the operation.

“A little bit of everything, I would say,” Santa Maria said. “A little bit from running the bus, working on the buses, figuring stuff out — it's a little bit of everything around here.”

Santa Maria said there was a lot of trial and error with the first bus, which made putting together the second one a little easier.

“With the second bus it was much easier because I've done it before, so I was able to kind of go off what we didn't like the first time and then move it on to improve it the second time,” he said.

There was even a change to the service window on the new bus.

“On the older bus, the window opens up, versus the new bus, it comes down just because I'm taller, so it's kind of hard to cramp in the window,” Santa Maria said.

As Lemonade Lab added buses, its following online was also growing.

Pettis said it took about a year or two to really get the business' name out there. She said Lemonade Lab first grew to around 2,000 followers before jumping to about 76,000 within a year.

“We've literally just skyrocketed, and it's been very popular,” Pettis said. “Everybody seems to love it. Everybody reposts it, and it seems to bring a lot of joy to our community.”

She said things changed quickly after Lemonade Lab went viral.

“After we went viral, it was like nonstop,” Pettis said. “Our bus was busy at events, at our normal 20th and College spot.”

Now, customers follow the business online to find out where the buses will be next.

“People look for us all over,” Pettis said. “People follow us to different locations, bring a lot of joy to the community all over, and it's just nice to see a smile on everybody's face when they come.”

Sometimes people find the bus when Pettis and Santa Maria aren't serving lemonade at all.

“We'll go to like wash the bus on the outside or to the gas station, like the wildest places where you would never think, and we'll always have people,” Santa Maria said.

He said people even approached them while CBS 58 was shooting the story.

“They always come like, ‘Hey, are you guys serving? I've been trying to catch you guys,’” he said. “It's crazy.”

Customer Elijah Fox said the bright pink bus makes it pretty easy to know when Lemonade Lab is nearby.

“I love the pink bus,” Fox said. “I love how she chose the color pink because it pops. How it stands out. That's how you know she's here.”

Fox has been following Lemonade Lab for years and came out when Pettis was giving away free lemonade to the community.

“I love everything that she does, and I'm just glad that she's here in the Milwaukee community,” Fox said.

His favorite drink is a combination of green apple and blue raspberry.

“At this point, it's my special,” he said.

Santa Maria goes with cucumber lemonade.

“More of like a refreshing type of vibe,” he said. “That one just hits the spot perfectly.”

Some customers are willing to travel a lot farther for their favorite drink.

Pettis still remembers a woman who drove about two hours to visit Lemonade Lab for the first time around two years ago.

“She orders like, I want to say four or six drinks. It was her first time coming. She drove about two hours,” Pettis said. “I was just so appreciative. Like, you really drove two hours just to come to my business?”

The customer took the drinks home and later posted about how much she and her family enjoyed them.

Then she drove back again.

“Not too long later, she comes back again from another two-hour drive,” Pettis said. “I'm just — I couldn't be more grateful.”

Some customers have even followed Lemonade Lab from Wisconsin to Florida.

From May through October, Pettis said the two buses operate in Wisconsin, traveling to events around Milwaukee and surrounding communities. When they aren't at an event, they're parked at their regular locations near 20th and College and 51st and Lincoln.

Then, from October through April, Pettis takes the business south.

“October to April, we are in Florida with our boat,” she said. “We do fresh-squeezed lemonades on a boat. It's a little pink Jon boat, and we go around to the sandbars and the beaches, and we go sell lemonade there.”

That means there isn't much of an offseason for Pettis.

“Lemonade for me is year-round. I'm never stopping,” she said. “Every single day, I'm surrounded by lemonade, which is nothing to complain about.”

Pettis said she likes having a business that isn't tied to one place.

“I think it's really cool to have something mobile,” she said. “I'm not strictly stuck to anything. I can go wherever I want and move as I please.”

Fox said he visits Florida and has also gone to Lemonade Lab while there.

“She travels to Florida, where I usually visit every year,” Fox said. “I just love how she goes everywhere out of her way.”

Pettis said her family and friends have been a big part of helping the business grow.

“My family and friends, my mom, my boyfriend, everybody has been a huge, huge support,” she said. “They helped me do everything, literally from driving to prepping to cleaning to loading, everything. And I literally wouldn't be here without them.”

She calls Santa Maria her biggest support system.

“He helps me every single day, start to finish,” Pettis said. “We wake up together, we go to bed together, we work together. We're together 24/7, which might be a little controversial for some people, but we actually don't mind it.”

Pettis said working together means they're always checking in and making sure nothing gets missed.

“We're always double-checking each other,” she said. “It's just nice having somebody right by my side.”

When asked if Santa Maria is her “main squeeze,” Pettis laughed.

“He is my main squeeze,” she said.

Santa Maria has watched Lemonade Lab grow from Pettis' original idea into something much bigger.

“I'm probably the proudest of anyone there is right now,” he said. “It's crazy to see.”

He said he believed the idea could be successful from the beginning.

“I knew it was always going to be big, but I didn't think it was going to get as big this fast,” Santa Maria said.

He also sees how much work goes into it behind the scenes.

“Everyone thinks it's easy, but it's really not,” he said. “It's a lot of long nights, early mornings, long days.”

“There'll be sometimes where I see her working 20 hours, like from work to content,” Santa Maria said. “I'm so proud of her. It's ridiculous. I don't think anybody else could do what she does.”

Pettis already has plans to take Lemonade Lab even farther.

“We plan to franchise,” she said. “Hopefully we have Lemonade Labs all over the nation or even the world. I can really see it doing big things.”

She said people from around the country and even outside the U.S. have already reached out asking if Lemonade Lab is a franchise.

“I'm like, ‘Almost, almost,’” Pettis said. “Once we get there, I think it's just going to skyrocket from there.”

Running the business in both Wisconsin and Florida has also given her confidence that the idea can work in other places.

“Me trial and erroring in two different states, I can see that it works,” Pettis said. “Going somewhere to a whole new state for the first time to conduct business, it was awesome.”

She hopes Lemonade Lab could eventually expand to places like New York and California.

But Pettis also hopes what she's already built can send a message to other young people in Milwaukee.

“In the Milwaukee community a lot, you hear a lot of negative things, so I feel like these positive things need to be encouraged and influenced more, especially to our younger crowd,” Pettis said.

She remembers being told growing up that she could do anything and wants other young people to hear that same message.

“I just want to say to the younger community that you can do it too,” Pettis said. “I started at 19. I started at 19. So nothing's impossible.”

Her advice to anyone else with an idea is to start somewhere.

“Start small and then grow into something big like I did.”

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