Coffee cupping is the process of observing and evaluating the taste and aroma of coffee. It involves a group of people (usually coffee experts) who gather around a table with several samples of different types of coffee beans. They grind the beans, add hot water, and then taste the coffee.

During the cupping process, the experts evaluate various characteristics of the coffee, such as acidity, sweetness, bitterness, aroma, and aftertaste. They use special spoons to slurp the coffee to ensure that it coats their entire tongue, allowing them to identify specific flavors and nuances.

Overall, coffee cupping is a way for experts to determine the quality of different coffee beans and to identify any defects or unique characteristics. It's an important tool for roasters, buyers, and growers in the coffee industry to ensure that they are producing and selling high-quality coffee. 

To conduct a coffee cupping session, you'll need a few basic supplies. Here's a list of some of the essential equipment and materials:

Coffee beans: You'll need a selection of different coffee beans, typically between three to ten varieties, depending on the size of the cupping session.

Grinders: You'll need one or more coffee grinders to grind the beans just before cupping. 

Cups: Cupping bowls typically with a capacity of 7-10 oz.

Spoons: Cupping spoons are specially designed spoons that are used to taste the coffee. They have a deep, bowl-shaped end that allows the coffee to be slurped and evaluated.

Hot water: You'll need a source of hot water to brew the coffee. The water should be between 195-205°F (90-96°C) for optimal extraction.

Scale: A digital scale is essential for measuring the correct amount of coffee beans and water for each cup.

Timer: A timer is necessary to ensure that the coffee is brewed for the correct amount of time.

Flavour wheel: A flavour wheel is a chart that identifies different flavours and aromas that are commonly found in coffee. It's helpful for describing and evaluating the coffee's taste and aroma. 

Pen and paper: To take notes during the cupping session, it's helpful to have a pen and paper to record your observations and ratings.

Overall, the goal of the cupping supplies is to ensure that the coffee is brewed consistently and evaluated objectively.