insufficient grounds

It's by no means a serious problem but the frequency of discovering/remembering in the morning on a schoolday that there isn't enough coffee in the house for a flaskful is increasing. By not diluting the output in the standard flask I was able to get about a cupsworth today but must remember to buy several packets the next time I find a shop with a preferred variant on offer and chuck one in the back of the freezer for use in such situations.