Good suggestions all. As a backpacker, I carry Gatorade mix for use with water that I filter. I also make up individual packets of instant coffee and sugar for the mornings.
Because of weight, what I do is take a plastic sandwich bag (the cheaper, the better), and place a single serving of whatever into the corner. I heat up the blade of a very sharp knife ...
This thread got me thinking... Finally.
I need a single teaspoon dose for my drink. It occurred to me to try a drinking straw, paper or plastic. Fold an end over, heat seal or staple. Fill and seal.
I'm gonna try it.