you can use bubble wrap :)
default
Grammatically correct but illogical. We expect the package to include the letter, not the letter to include the package.
To send a letter or package by priority mail, the package or letter must be taken to the Post Office. There is paperwork to fill out and determine the date that package or letter needs to arrive.
It is the sender of a letter or package's address. It is used just in case the letter or package that is sent does not reach it's destination it can be sent back to the sender.
envelope
Envelope
An envelope is a flat paper container used for sending letters or thin packages through the mail. It typically has a flap that can be sealed to protect the contents inside.
An unusual odor, such as a strange chemical smell, could be a possible indicator of a suspicious letter or package. Other signs include excessive postage, misspelled words or addresses, and unexpected or unfamiliar senders.
package, massage, passage
envelope
it is a envelope.
It is possible.