"Being students, we have quite energetic lives, so this keeps us going.
"It's student food. It's cheap and it fills you up.
"It's high in protein, high in fibre, and it's a great energy food - and since we're all keen athletes, we love it."
He and his flatmates came up with the sponsorship idea while eating toast one night last year, Mr Hopper said.
"We knew the V [energy drinks] flat was on Dundas St and they were getting sponsorship, so we decided to give Pic's a go, and they were happy to go with it."
Pic's owner Bruce Picot was so impressed with the boys' proposal, he decided to visit Dunedin this week to deliver their first bucket of peanut butter.
"I thought it was a neat idea," Mr Picot said.
"Presumably, their flat will become really famous around here and people will come here for a snack."
The boys plan to tour the Nelson factory later this year as part of a promotion for Pic's. The flat sponsorship initiative appears to be spreading - excuse the pun - with the neighbouring flat of girls trying to secure sponsorship from a bread manufacturer.
Ellen Edmonds, 19, said having a flat full of boys next door with an endless supply of peanut butter would be a match made in heaven.
"We'll catch up for breakfast at our flat because it's sunny in our kitchen in the morning, and we'll have supper together at the boys' because it's sunny in their kitchen in the evenings," she said.