The FirstCape Limited Release Sauvignon Blanc/ Semillon, which was produced by Thresher's head of global sourcing Jonathan Butt in conjunction with the FirstCape team, is priced at £5.99 a bottle.
"This wine is great for summer," said Butt. "The immediate appeal of the wine showcases the potential for South African aromatic white wines."
Greg Wilkins, director of FirstCape importer Brand Phoenix, said: "We're delighted with this new blend and are sure that Thresher will enjoy much success with it."
FirstCape's first dual-varietal Limited Release wine, which is described as having strong up-front fruit flavours with crisp acidity, is available from Thresher stores now.