system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come Pepsi can sell a 1liter pop at my store for only .99, a 20 ounce for 1.72 and two 2liters for 2.22 sale.

This always confused me how a small bottle of pop, generally from a pop machine or a gas station, costs almost $2, whereas a 1liter of pop sold at my Shopko sells for $.99, and then at Caseys they can have deals where you can get two 2liters for $2.22. Don't they lose money if they put lower prices on higher costs, or is it that they determine more people are willing to buy the easier to access / drink?
gpt
The smaller bottles are usually more convenient for people, so they attract a higher price than they would if it was just based on content. On top of that, most small bottles are chilled, which is both an extra cost and an extra convenience so the price goes up more.

Larger bottles are normally stored on a regular shelf, and the product itself is dirt cheap, so there's no real loss to selling large amounts at low prices.