It is not usually a good idea to send food products via the post office. Some people simply don’t think about the time it may take to ship these, especially across the border where wait times could delay a parcel by weeks. In the case of cup noodles or ramen, since it is a dry pre-processed food, you probably would not have an issue doing this, depending on how many you are shipping. One or two packages that was listed on the waybill as a sample for a friend to try would probably be okay, but sending a crateful would be considered “importing” and you might need a business license. Some of the things people have tried to import and I have seen or heard was stopped include fresh fruits, honey, exotic plants, cheeses, root vegetables such as potatoes, and live seafood. I would suggest checking either the website for Canada’s Border Services, or ask post office where you are what their restrictions are for sending food such as that internationally.