Britvic Tonic Postmix Syrup is a 7 litre bag-in-box concentrate for authorised Britvic post-mix dispensers. The syrup is quinine-based and is intended to be diluted 1 part syrup to 5 parts carbonated water, producing a classic tonic character with a crisp

Britvic Tonic Postmix Syrup is a 7 litre bag-in-box concentrate for authorised Britvic post-mix dispensers. The syrup is quinine-based and is intended to be diluted 1 part syrup to 5 parts carbonated water, producing a classic tonic character with a crisp