A bloated milk carton could be totally harmless, or it could be a sign of spoilage. It's totally harmless when it's the result of air pressure changes due to altitude or temperature.

The milk cartons which acted as moulds served double duty, he explained with a wink. It turns out, even torn, you can still get your deposit back. "This was a nice surprise," Amell said.

The Genius Milk Carton Trick We Wish We’d Known About Sooner first appeared on Parade on Jun 9, 2025 This story was originally reported by Parade on Jun 9, 2025, where it first appeared.

The Pennsylvania-based company, which sells milk along with other dairy products and beverages like juice and iced tea, processes 1.3 million small milk cartons each week, Galliker said.

The milk cartons which acted as moulds served double duty, he explained with a wink. It turns out, even torn, you can still get your deposit back. "This was a nice surprise," Amell said.

The little milk cartons go not only to schools, but to other institutions like nursing homes and correctional facilities. It has about 500 institutional customers buying these items.