Chicago-based Argo Tea announced that is partnering with Whole Foods Market, a wholly owned division of Seattle-based Amazon, to launch a line of ready-to-drink (RTD) cold-brew, single-estate bottled teas into the retailer’s stores nationally. The release of the RTD line follows a successful test of the handcrafted single-estate, cold-brew teas in the company’s Argo Tea cafés last year, the company says. By slowly cold-brewing the single estate teas, the company is able to extract high concentrations of the right tea cells — flavonoids and antioxidants — giving . . .