(Now they hitch a ride on the seams of nylon luggage.) Feather beds are much more expensive than down-filled duvets or comforters. They are a heavier construction. So if you live in a damp climate without central heating, it may suit you to use the feather bed as a warm covering. If, on the other hand, you live in a place with all the modern conveniences, it would be better used it to even out a lumpy or hard matress.
Sometimes the liquid contact indicators are placed in such a way that they can be inspected from the outside. For instance there is a LCI in the headphone connector, the dock connector, and near the SIM-card slot of an Apple iPhone.
Apple's warranty for water-resistant iPhone 7 doesn't cover liquid damage. The iPhone 7 and iPhone 7 Plus can survive 30 minutes under a meter of water, but don't test them unless you've got additional protection. Apple's iPhone 7 and iPhone 7 Plus offer nearly the same water and dust protection as Samsung's flagships.