Add another $2 million in funding for mobile payments startup, Flint Mobile.

The company said on Tuesday that Verizon Investments was contributing to Flint’s Series B round of funding. The additional capital from Verizon Communication’s investment division boosts Flint’s total funding for this round to $8 million.

Flint also announced integration with Apple’s Passbook. According to Flint CEO Greg Goldfarb, the idea is to “enable little businesses that don’t have a lot of technology resources and no cash register to act with the efficiencies of bigger businesses.” The Passbook integration will allow coupons and offers to be added to digital receipts, which can be sent via email or stored in Passbook. Users will also be able to manage payments, send invoices, and receive payments online.