Which product packaging adaptation did Frito-Lay implement specifically for high-altitude regions like the Rocky Mountains and Andes?

In the world of retail geography, altitude can significantly impact product design and packaging considerations. Brands operating in various elevations around the world must adapt their products accordingly. This trivia question explores a fascinating adaptation that one major snack company implemented to address a specific geographic challenge.

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Adding more air to chip bags to prevent them from bursting at high elevations
Using thicker plastic packaging to withstand increased UV radiation at altitude
Switching to square-shaped bags that stack better in mountain delivery trucks
Including humidity-absorbing packets to counter increased moisture in mountain environments