
Mark Zuckerberg may be a billionaire but he's not above lugging around his toddler's potty training seat.

The Facebook founder was spotted in Hawaii on Thursday, carrying his daughter's training toilet and sippy cup after having lunch at casual burger joint Bubba's in the town Kapaa on Kauai.

After lunch, Zuckerberg was seen smiling as he carried two massive cups of Hawaiian shaved ice.

Facebook founder Mark Zuckerberg was seen toting around his daughter's training toilet on Thursday in Hawaii

Another photo shows Zuckerberg setting the training toilet up on the floor of the restaurant's patio

The social network's CEO is taking the month of December off for paternity leave. His second daughter, August, was born in August

Earlier this month, Zuckerberg announced that he would be taking the month of December off for paternity leave. Zuckerberg and his wife Priscilla welcomed their second daughter, August, in August. Their first daughter, Max, turned two earlier this month.

The warm Hawaiian weather meant that Zuckerberg ditched his usual black hooded sweatshirt in favor of a purple t-shirt, black gym shorts and Adidas sandals.

He showed some Bay Area pride by wearing a Golden State Warriors hat.

Zuckerberg was seen chatting to a male friend during the outing, who was similarly casually dressed, wearing navy Crocs.

His wife Priscilla also went out to lunch, looking a bit more put together in a chambray top and pearl earrings.

The family grabbed a bite to eat at Bubba's burger join in the town of Kapaa, just 10 miles from the old sugar plantation they bought in 2014

Dutiful dad bought a backpack to lunch - no doubt stuffed with things to entertain the kids

Zuckerberg was joined on the outing by a male friend. Both were dressed casually for the warm Hawaiian weather

Zuckerberg showed some Bay Area pride by wearing a Golden State Warriors hat

The restaurant is about 10 miles from the 700-acre former sugar plantation that Zuckerberg and his wife bought for $100million in 2014.

Zuckerberg drew the ire of locals last year, when he attempted to acquire 14 parcels of land that bordered their already sprawling property.

The land had been granted to natives in the mid-19th century, and because many of the owners died without wills the lots now have hundreds of owners, and many are not even aware of their stake in the property.

Zuckerberg petitioned the court to try and identify the owners and then auction the land, a move some equated to stealing from natives.

Earlier this month, Zuckerberg announced that he was taking the month of December off for paternity leave. His eldest daughter Max, who he is pictured with above, recently turned two

Zuckerberg is now a father of two. He's pictured on the left with daughter August, who was born this past August, and on the right with eldest daughter Max

When Zuckerberg's real estate move was criticized in the press, be backed down, saying they would look for alternative means of working with the locals.

'We've heard from many in the community and learned more about the cultural and historical significance of this land.

'Over the past week, we've spoken with community leaders and shared that our intention is to achieve an outcome that preserves the environment, respects local traditions, and is fair to those with kuleana lands,' Zuckerberg wrote in an op-ed for The Garden Island.

He added: 'To find a better path forward, we are dropping our quiet title actions and will work together with the community on a new approach.

Zuckerberg and his wife bought a 700-acre property on the north shore of Kauai for $100million in 2014

He got into a legal dispute with locals when he tried to buy 14 more parcels of land to add to his already sprawling estate

Locals were angry because the land in question was allotted to natives and passed down through several generations. Above, a look at some of the property

Zuckerberg agreed in early 2017 to drop his legal battle to win the properties. Above, another view of Kauai's north shore

Zuckerberg's Palo Alto home is pictured above. He has bought several houses surrounding the property to give his family more privacy and security

'We understand that for native Hawaiians, kuleana are sacred and the quiet title process can be difficult. We want to make this right, talk with the community, and find a better approach.

'The land is made up of a few properties in Waipake, Pila'a, and several kuleana within them. As this community knows, the history of this land is complex. Many of you have shared your families' stories, and we want to honor their history.'

Zuckerberg then took some time to pat himself on the back by pointing out that the land he purchased would have possibly become a development had he not swooped in and picked up the property.

He pointed out that same fact back in July when residents grew upset with the massive stone wall he erected around his land, which eliminated views of the water for some and created problems with beach access.

A section of the property called the Kahuaina plantation had been subdivided for 80 luxury homes prior to Zuckerberg's purchase.

Now the land remains relatively untouched - but surrounded by a wall. Zuckerberg said he planned to build just one home on the property.