Home Slickdeals Costco Members: Portofino Solid Yellowfin Tuna in Extra Virgin Olive Oil with... Slickdeals Costco Members: Portofino Solid Yellowfin Tuna in Extra Virgin Olive Oil with Sea Salt, $5.69 after Instant Savings in warehouse(ymmv) By ARCOM - 10 February 2023 25 0 SHARE Facebook Twitter Go to the deal page: Costco Members: Portofino Solid Yellowfin Tuna in Extra Virgin Olive Oil with Sea Salt, $5.69 after Instant Savings in warehouse(ymmv)