Zarf to avoid mistakes. The United States Navy also has an item, usually made in the on-base metal shops, that is bolted to bulkheads and consoles to hold coffee cups. The Navy zarf is not ornamented. Zarf A zarf (plural: zarfs, zuruuf, zarves) is a holder, usually of ornamental metal, for a coffee cup without a handle (demitasse or fincan). Although coffee was probably discovered in Ethiopia, it was in Turkey at around the thirteenth century that it became popular as a beverage. As with the serving of tea in China and Japan, the serving of coffee in Turkey was 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