Cup holder Cup holder A cup holder is a device, such as a zarf, to hold a cup or other drinking vessel. It may be free standing to hold cups securely on a desk or other flat surface, or in a tree style to store sets of cups in kitchens. They may be built into automobiles or chairs, or fixed to the walls of airplanes, boats, buses and trains. The development of the drive-in restaurant was a step in the cup holder's development. Servers would attach a tray that hooked over the car's side window, which needed to be left up a
Coffee filter 10 to 15 micrometres. For a filter to be compatible with a coffee maker, the filter needs to be a specific shape and size. Common in the US are cone-shaped filters #2, #4, and #6, as well as basket-shaped filters in an 8-12 cup size. Other important parameters are strength, compatibility, efficiency and capacity. If a coffee filter doesn't possess enough "strength", it will tear or rupture, allowing coffee grains to collect in the coffee pot. "Compatibility" describes a filter medium's resistance to degradation by heat and chemical attack; a filter that is not compatible with the liquid passing through