i actually keep them near the vent in the fridge which gets its cold air from the freezer. usually at the to left or bottom left of the fridge. that's my secret storage location. makes for coldest beer ever.
these are perpetually kept in the garage fridge (drinks and costco overflow fridge). i buy the 15 pack of coors lights in 1 pint aluminum bottles and keep 5-6 in the fridge at all times and near the vent. so there's no specific time period, but the temp that's coming from the freezer is ZERO degrees as it blows/shares from the freezer into the fridge.
when you crack open the bottle, that first sip has ice crystals you can feel on your tongue. the only other way i can get that is these beers in iced water with a lot of ice and at the bottom of the cooler. there's nothing like a crisp, cold beer. and im a sucker for coors lights.