Have You Considered a Collapsible Coffee Cup? Dog owners, I’m looking at you. If you’re a frequent walker—somebody who primarily commutes this way but possibly also someone who spends a good amount of time outdoors with a four-legged friend—you might be familiar with the extremely specific problem of having to figure out what the heck to do with your portable water or coffee container once that vessel’s contents have been depleted. Lugging it around isn’t such a big deal when it’s full of delicious coffee or an ice-cold beverage, but running errands with it definitely starts to feel like an annoyance once it’s empty, particularly if you’re also trying to manage an energetic pup.