The localchoice milk is sourced from small local farms and sold at 625 Tesco stores in England and Wales.
There are presently 14 different regional milks available: Dorset, Devon, Cornwall, Somerset, Cheshire, Lancashire, Yorkshire, Cumbria, East Anglia, the North East, the South East, the South West and the heart of England and Wales.
P&W has designed a range of packaging that looks very simple, and does not feature the Tesco branding.
Adrian Whitefoord, co-founder of P&W, said: "The usual clutter normally associated with packs of this type have been moved to the back of the pack."
Localchoice is part of the £25m annual investment Tesco announced last month to support the British dairy industry.