The World’s Best Drink Cooler May Come From Pineapple Scraps

When life gives you pineapples—and hundreds of millions of tons of pineapple waste—what do you do? Engineers in Singapore and Vietnam decided to turn all those scraps into something useful—insulation for their piña coladas. Not only does their new material keep drinks chilled better than many commercial coolers, but it could also offer a final resting place for the world’s pineapple waste.

Pineapples make up about 20% of the world’s tropical fruit production, with more than 25 million tons harvested each year—but more than half of this forms waste byproducts like leaves, peels, and seeds.

To find a use for those leftovers, the researchers mixed pineapple fibers, which they shredded in a blender, with polyvinyl alcohol as an adhesive agent and deionized water as a solvent. They then treated the mix with ultrasound and heated it in an oven at 80°C for 2 hours. The suspension that formed was then chilled before being freeze-dried.

The result was a pale yellow aerogel that is lightweight, flexible, and more than 96% porous—properties that make it ideal as an insulating material against both heat and sound.