1 For postage rates for Large Letters, please click Local Mail, Air Mail, Surface Mail for details. 2  Maximum dimensions: length, width and depth combined: 900 mm, but the largest dimension may not exceed 600 mm. 3  Minimum dimensions: 90 mm x 140 mm.  Maximum weight: 2 kg.
Confidence votes 572. Some people would consider the risk of bacteria in food being left out too great to risk eating after one hour. Open Yogurt will separate after 4 hours, and will spoil after 12 hrs at room temp. Yogurt, though, is produced with bacteria, changing its spoilage dynamic.
The length of time yogurt is safe to eat after its expiration date depends on whether the date is a âsell byâ or âuse byâ date. Regardless of the date, do not eat yogurt that has a blue-green tint or smells or tastes unusually sour. Most yogurt is stamped with a âsell byâ date rather than an expiration date. The yogurt should be good for about two weeks after the âsell byâ date, according to Julie Garden-Robinson, a food and nutrition specialist at North Dakota State University.