"There is no limits - it is just as much as we can sell."
To kick-start the fundraiser Frucor Beverages also donated $1000.
"We will be giving every cent made to Jackson on Saturday from the coffee and from now until September 3 we will be taking donations."
Ms Whatuira's son had melanoma but luckily for them it wasn't advanced.
"This could be any of us and I think it is a great cause that we want to get right behind. How great would it be if we could all help make a difference?"
Mr Alexander's father, Simon Alexander, said there were some good people out there and every bit helped.
"It's not hard to do - people just need to have the heart to do it - so I hope everyone can get behind it as all these things help us."
Dabrafenib and Trametinib are not funded by the Government and the family applied for funding from Pharmac and special circumstance funding from the Health Minister but were told this month their applications had been denied.
Having already raised $124,000, they now need another $100,000 so Mr Alexander can continue to take the medicines for at least another five months.
They wil buy him valuable time so he can live a normal life and experience things every 21-year-old should.
He said these drugs have allowed him to live a life, which back in January wasn't looking likely. He has been able to get back into work, jump out of a plane, go snow boarding and do everything he wants to do.
To support Jackson Alexander people can head to Cafe Ahuriri on Saturday to get their coffee fix or leave donations at the cafe until September 3.
To donate directly to Mr Alexander put money into his account at 03-0779-0005218-000 and to follow his journey like his Facebook page "Save Jooky".
