Plain fresh milk will start to taste a bit sour after a few days and will turn after no more than a week or so; or it could turn in a day if it's left out at room temperature.
What you want to get is micro-filtered milk. Cravendale is the main supplier I know of, but some of the supermarkets' own brand have micro-filtered versions, with markup.
Micro-filtered milk will last a few weeks, up to a month, without curdling.
What you want to get is micro-filtered milk. Cravendale is the main supplier I know of, but some of the supermarkets' own brand have micro-filtered versions, with markup.
Micro-filtered milk will last a few weeks, up to a month, without curdling.