There are three types of cheese tortellini that you can find in most stores. Frozen tortellini, fresh tortellini and shelf stable tortellini (this is dried and found not refrigerated.) Fresh tortellini is tortellini that was made and refrigerated right away. It can be found in the refrigerated section of stores. Frozen tortellini is fresh tortellini that has been frozen to extend its shelf life. You can find this in the freezer section. Shelf stable (or dried tortellini) is tortellini that has been dried and sealed in packaging to make it safe for grocery store shelves. I prefer using fresh refrigerated tortellini because it cooks up in 2-3 minutes and it is the freshest option. You can also find really wonderful high quality brands that make a delicious tortellini when you buy fresh tortellini.