If you need to make a piping bag pronto, you just need to pull out a roll of aluminum foil and get to ... a plastic resealable bag (such as a Ziploc) can also be used for piping purposes ...

To lock in moisture, wrap the dough in aluminium foil. Make sure the dough is well covered on all sides. Place it in a container for storage. Store the dough in a ziplock bag, removing excess air ...