1) definitely store them in the freezer in little plastic bags, they freeze easily, defrost quickly, and you can count how many you need/have 2) make different types of pavlova or meringues, ...

Just drink it! I love it.

1) Remember that regular food just does not taste the same on a plane. So you may need to spice up to make it tasty. 2) You cannot bring an empty bottle passed security as far as I have seen...