The brand has previously been limited to bottled varieties of pear and fruit ciders since its launch three years ago.
St Helier Still Pear is in a 3-litre box and has an abv of 5%.
The rrp is £7.49, which ICB managing director John Mills described as a “canny buy”.
He added: “The time was right. Consumers will love the convenience of the box and the fact that they can keep it in the fridge and have it chilled and ready on-tap whenever they feel like it or the occasion demands.”