#11: Bottle Caps That Come Completely Off
Small design differences can be more annoying than expected. In America, many plastic bottle caps still come off completely, which makes them easy to drop, lose, or leave behind. For visitors used to attached caps, it can feel like a tiny step backward in convenience, especially while walking or traveling.

Detached caps were the standard design for decades because they were simple, cheap, and familiar to manufacturers and customers. Tethered caps became more common elsewhere because of litter and recycling concerns. The U.S. has been slower to change across the board, partly because packaging rules are less uniform nationwide.
