If I'm not mistaken, I think that when you buy soda in Mexico, they often pour it into a bag, so I'd guess it's just coke or something. Not sure about beer and stuff though.

I spent like 30 seconds trying to figure out how this was loss.

Which is why this is my favorite dice bag.

https://www.rkpost.net/product-page/db114-color-cathulhu-dice-bag