FOOD HACKS TO TEST FRESHNESS .. AND COOL BEVERAGES
DETERMINE if an egg has gone bad by placing it in a bowl of cool water. If it sinks onto its side, it's perfectly fine. If it sinks and stands on its smaller end, it's still edible, but won't be for very much longer. And if it floats, it's bad. How does this work? Fresher eggs have less air under their shells, which is why they sink to the bottom.
NOTHING COLD TO DRINK IN THE FRIDGE?
Say you went to the fridge for a LaCroix, only to discover that no one restocked the shelf. The cans in the pantry aren't cold, and putting one in the fridge now will take forever to cool. To have an ice cold can in just a few minutes, put your drink in a large pot and cover it with ice. Fill the pot with water, add a couple cups of salt, and stir until the salt is dissolved. Your canned beverage will magically be cold. (Alternative: Unless you need the portability of the aluminum can, keep it simple with a cup of ice.)