It is World Ocean Day and along with a number of beach clean-up efforts, youngsters kicked off a campaign of their own.
Bottle caps and lids were brought to the Beretania Goodwill store by the youngsters from UH Lab school.
It is the beginning of a campaign by the Beach Environmental Awareness Campaign Hawaii.
If caps are not recycled, they could end up harming marine wildlife or seabirds that eat them.
"One hundred percent of these birds are ingesting this plastic and feeding that plastic to their chicks and hundreds of thousands die every year in Hawaii with stomachs filled with items such as caps and lids," said Suzanne Frazer of Beach Environmental Awareness Campaign Hawaii, or B.E.A.C.H.
B.E.A.C.H is partnering with Goodwill, Matson, Young Brothers and Pepsico.
"We've got this operation going on in Hawaii and the ability to do something like this, no matter how minor, is still contributing and giving back to the environment and the island of Oahu and hopefully the neighbor islands in the very near future," said Tom Perkins of Pepsico.
"I'm so very happy that this has come so that whole of Hawaii can get involved and help with this issue through this new recycling project that's going to make such a difference," said Frazer
The kids had fun dumping their bottle caps and lids into the barrels - which anyone can do at any Goodwill location on the island. But one youngster said there was SOME work involved.
"It was sort of fun washing them. It was fun, yeah," said Kristina Ricote of UH Lab School. "Then we had to count them - - a lot of them."
For more information, visit: www.b-e-a-c-h.org/recycling.html