Originally Posted by EuBrew
Just put a airlock on it or foil and shove it in the fridge. When brew day comes get it out in time for it to warm up in time to pitch. You can decant off the liquid and just leave enough to shake the yeasties free that way you don't have to pitch the whole 2L.
I would do the same: fridge, decant and warm up. 4-5 days in the fridge isn't a long time, but I would add anyway a little starter to it (maybe 0,5L) after it warmed up, to let it accelerate eating again, especially if you are going to brew a beer with an OG of 1060+.