There is no definitive answer to this question as it depends on the condition of the copper cup and how much tarnish is present. If the cup is in good condition, then it may be possible to drink from it. However, if there is a lot of tarnish present, then it may not be safe to drink from it.

There are a few different ways to clean copper. Some people use vinegar and water, while others use a copper cleaner.

The easiest way to clean badly oxidized copper is to use a mild acid such as vinegar or lemon juice. Once the oxidation is removed, you can polish the copper with a fine-grit cloth.

Unfortunately, copper cups are not machine washable. They may be hand-washed with gentle soap and water, but the copper will eventually tarnish if left untreated.

There are a few things that are not generally safe to put in a copper cup, including sharp objects, flames, and chemicals.

Yes, vinegar is safe to use on copper. Vinegar is a natural cleaner and can remove dirt, grease, and corrosion from copper surfaces.

Copper oxidation can be removed by a variety of methods including acid etching, electrochemical plating, and the use of a copper-containing catalyst.

Yes, oxidized copper can be restored. Oxidized copper is usually caused by exposure to air, water, or other elements. Restoration can involve cleaning with a mild acid or a detergent, then a protective coating.

Copper is a soft metal and will often have dents or depressions from being struck with a hammer. If the cup is real copper, the metal should be smooth.

Yes, copper cups can be put in the dishwasher. However, it is important to note that they may corrode over time if left in the dishwasher. It is also important to check the manufacturer’s instructions for specific instructions on how to clean copper cups in the dishwasher.

There are a few ways to clean copper without removing patina. You can use a wire brush, a brass brush, or a copper cleaner. You can also use vinegar and water to clean copper.

There is no evidence that drinking copper water can have any health benefits.

To clean copper with baking soda, first wash the copper with warm water and a mild soap. Next, mix together one cup of baking soda and one gallon of water. Pour the mixture onto the copper and let it sit for 30 minutes. Rinse the copper with fresh water and dry it off.

WD40 does not clean copper.