A silk screen printing company in Davao is set to make a killing with their latest product.... Rodrigo Duterte tee-shirts, printed by the dozens.

Shirts with the Philippines presumptive president's nickname- the punisher- are selling for between four and nine dollars.

Some of the newer designs are meant to look like a biker gang logo to fit Duterte's tough talking image.

Memorabilia stands are popping up all over the city where Duterte was once mayor and where his popularity is unrivaled.

Customers have been lining up early.

We went here quickly because we were afraid everything would be sold out, one person said.

Duterte's foul mouthed campaign and tough stance on crime endeared him to voters.

And for shop owners in Davao, there are even more reasons to support him.

Thank you Mr. Duterte, one vendor said. Because of you our business is booming and it's a big help to our family.