Save Mart Supermarkets is partnering with local food banks to hold a “Peanut Butter Roundup” at its 83 stores throughout California and Nevada.

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Jif peanut butter and Smucker’s jelly are participating in a buy one-give one promotion. Whenever someone buys a jar of peanut butter or jelly, he or she gets another one free to donate.

Collection barrels will be located near the checkstand areas.

Last year Save Mart and its sister store Lucky receive nine tons of peanut butter through the promotion.

Also new this year is a “roundup” feature at the cash register, which allows shoppers to round-up their grocery tab with all of the change going to local food banks.

“We raised enough peanut butter in 2015 to make more than a quarter-million sandwiches,” said Nicole Pesco, co-president and chief strategy and branding officer of Save Mart. “We’re thrilled to be able to help the communities our stores serve.”

The promotion is meant to raise awareness of the struggles many families experience during the summer when kids have no access to school meals.