Coffee Mug Style Self-Selector

personalized-drinking-coffee-mug
How do you take your coffee? This mug may not be too useful for any particular individual but would
certainly be handy for having guests. They can simply twist the metal rings to show what they want and leave them in place for refills.
These would of course also be ideal for commercial applications – save a barista time and headache trying to remember who ordered what and how they wanted it.
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