Buttermilk.

sniper03, Jun 26, 8:56pm
How long does it last for? Bought some last week and have used half rest has been kept in the fridge,should be still good to use?

veejay13, Jun 27, 4:17am
Hasn't it got a use-by date on it? Some I bought recently had a date three weeks ahead, so yours should still be okay if you only bought it last week.

kay141, Jun 27, 4:49am
Many cultured products say on the container to use within a certain number of days once opened. 5 or 7 days seem to be the most common.

griffo4, Jun 27, 6:54am
l have left it in the fridge longer than that and used to and it has been fine

gilligee, Apr 28, 2:57am
Me too. Weeks old and the scones were delicious.
Sour cream is great for scones.