This document studies the permutations of using a plastic grocery bag to store a wet umbrella while shopping. It examines three dimensions: whether it is worth using a bag to avoid ruining other belongings, if a bag is available to use, and if holding a dripping umbrella poses a safety hazard. It conceptualizes this as a linear view with the three dimensions plotted on an x-axis against potential options on the y-axis to analyze the problem from different angles.