They have been round for hundreds of years
Plastic.
Some fancier pens are made of certain types of metal.
plastic
Plastic and contain ink
cups,pens,pates,silverware,plastic bags,sandwich tubs,ext.
Pens come in different sizes and weights. Weigh one of them, then multiply the number you get by 100,000.
Ballpoint pens generall have several different parts. Ballpoint pens have a main body which holds the ink. The ink is usually in a long tube made of plastic or metal. Ballpoint pens also have clips to attach to shirts, files, or papers. There is also a spring inside the pen that keeps the writing end safe. The writing portion of the pen is usually a small metal or plastic cone with a very small ball bearing inside.
Some pens can be recycled but some can`t. Only plastic pens can. But you need to take the ink cartage out. GO GREEN!!!
Garrett Specialties is a promotional company where you can order customized pens. They have a variety to choose from including plastic, metal, mechanical, highlighters and novelty pens. Their pens can be imprinted with your company logo to help advertise and market your business.
Pens
Because cheap pens are cheap, they aren't as reliable in general. Expensive pens are usually made more carefully and with better material.