Which of the following items would typically not be allowed through security screening at an airport?

A bottle of water would typically not be allowed through security screening at an airport due to regulations concerning liquids. The Transportation Security Administration (TSA) implements the 3-1-1 rule, which restricts passengers from bringing liquids in containers larger than 3.4 ounces (100 milliliters) in their carry-on luggage, and requires these to be placed in a single, quart-sized bag. Since a standard bottle of water exceeds these limits, it would not be permitted through security. In contrast, items such as laptops, travel books, and backpacks are allowed, though specific procedures may apply to how they are screened.