Imagine you only had one cup to use for the rest of your life. What would be your pick for the best all-purpose cup? What qualities would you seek and does this cup already exist?
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Pretty much everyone has gone with the mug form factor and I would add that a handle to hang or tie it is a must. I've spent entirely too much thought on this now lol. Something like a nano-ceramic material, a little like a seashell or teeth, might add enough durability to be another option other than metal. Metal is probably the most practical, but they have microwave problems, can have a weird taste, and can be subject to corrosion.
https://www.livescience.com/11696-seashells-strength-interlocking-bricks.html
