Storing food is a waste of money

While their parents' house was probably always stocked with groceries, millennials' pantries and refrigerators might look a little different. Many of them aren't tempted to buy groceries to stockpile, especially at membership-based stores like Costco.

They're only shopping and cooking for themselves, so why would they need two weeks' worth of supplies if they're never going to use them? Millennials like to buy things only when they need them, so spending money on groceries that could spoil seems like a bad investment.

Wine with a cork is a drawback

While millennials certainly consume and will continue to consume wine, the way they buy it has changed. Though once considered heresy in the wine industry, screw caps on wine bottles have become increasingly popular among this age group.

This is because millennials like to be constantly on the go, and a wine bottle that requires a cork isn't the best fit for their lifestyle. If they know they're going to the park or the beach to hang out with friends, they're very likely to leave the corked bottle behind.