Green Apple and Wild Berry will be available from November in 70cl bottles with a retail price of £11.49.
The additions follow the brands’ relaunch in September which included the introduction of revamped packaging and an improved filtration method.
Brands marketing controller Richard Clark said: "Red Square Vodka is number three in the off-trade and the fastest growing mainstream brand in the on-trade, offering a top quality product that’s value for money. After 25 years, the product has been improved – it is now carbon filtered resulting in a purer, higher quality and smooth tasting product – which has already resulted in increased sales.
“Adding to the range with subtle flavours was the natural next step for Red Square Vodka, to continue to give the on and off trade choice and innovation, and to strengthen and grow this successful brand.”