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 cup corner of the Space Cup allows the liquid to flow toward the drinker's lips through capillary flow. The data from experiments conducted with Space Cups can be used to better the design of fluid systems used in space, such as toilets, oxygen, air conditioning, and water coolants. The data can also be applied to societal uses of fluid systems on Earth, such as improving the design of portable medical blood testers for infectious diseases. Porcelain allows for heat retention and crema preservation. However, porcelain cools down quickly due to air bubbles in the cup. Crema is the coffee foam at