Fun fact, Pepsi (and most other popular sodas) in US are sold in following sizes:

• mini cans (7.5 ounces)
• classic cans (12 ounces)
• 16.9 ounce bottles
• 20 ounce bottles
• 1-liter bottles
• 1.25-liter bottles
• 2-liter bottles

why? fu, that’s why ;-)