(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.
Liquid contact indicator. A liquid contact indicator (LCI) is a small indicator that turns from white into another color, typically red, after contact with water. Those indicators are small stickers that are placed on several points within electronic devices like laptops and smartphones.