Alright, from the picture, I assumed they were squeezing cream in their hands during the run and the sweat was involved in the process. I am very happy that is not the case.

tl;dr - they run with zip lock bags of cream and salt and try not to get too warm, but it does all work.

Perfect for a little butter on the nips to prevent chaffing.

they pour heavy cream and salt into double-bagged Ziplocs and secure the squishy bags of dairy inside their matching running vests

Saved you a click.

You can make butter while fucking too...

This just in. Agitating heavy cream makes butter.

Y'all just discovered something people have known for, like, 5000+ years.

I remember making butter in kindergarten by putting the cream and salt into a little bottle and just shaking the shit out of it all damn day. By the time we went home, we had about half a stick of butter.

The attached image grosses me out.

sterile processing tech at a hospital

Not the most confidence-inspiring thing to read after seeing that photo

I went to the cheese museum in Gouda last year and they explained that according to the current theory our ancestors discovered butter and cheese by hanging pouches of milk on their horses or cattle while traveling. The movement would turn the milk into butter and, if they used pouches made of animal stomach, the bacteria would turn the milk into cheese. So this is more or less the method by which we discovered butter in the first place.

What an odd wonderful thing to do. I love it

Youse have just found a way to make exercise fattening

America is turning footsteps into butter

That's probably much less efficient than just using the machine that performs the same process though.

TIHI

We dug into the science...

Fuck yeah! Lower your risk of heart disease while you make shit that raises your risk for heart disease. Oxymoronic.