A bottle of salad dressing that we bought has a bright orange sticker on it that says “Keep refrigerated at all times”. It suggests that the dressing won’t just go bad, but could actually detonate at some point. Suddenly it’s not a condiment, but some sort of IED. “Soldiers in Afghanistan have been warned to be on the lookout for bottles of Parmesan Ranch.”
“Keep refrigerated” means that the item could spoil if not kept cold. “Keep refrigerated at all times” means that you can only bring it to the table with the kind of portable coolers that they use for transporting donated organs.