The tech filled milk jug - developed by designer Oliver Newberry - contains a PH sensor built into the base which measures the acidity of the milk.
This is then linked to an LCD screen on the side of the jug which reads 'Fresh' or 'Sour'. There is also an alarm system which alerts you when the milk has soured.
Bosses from milk firm Cravendale say Brits throw away 330,000 tonnes of milk each year - mostly because we are uncertain if it's okay to use - and that their new jug could combat this.
However, you can bet that even when the jug says "Sour" most people will still sniff the milk to make sure -- and then regret it.
A spokesperson for Cravendale said: "Our unique milk jug takes the guess work out of determining when your milk has soured which we believe should help reduce dairy wastage."