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If the set of coffee cups is something you can buy or find (outside of the movie company's website), then, yes, no problem. Use them. If the set is something not currently or formerly made but is...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/44004 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/44004 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
If the set of coffee cups is something you can buy or find (outside of the movie company's website), then, yes, no problem. Use them. If the set is something not currently or formerly made but is something a dishware company could easily do in the future (for example, an unusual color or pattern or style of handle), use them. If the set is unique to that movie (or franchise) and something that anyone familiar with the movie might identify, then proceed with caution, especially if they reflect a type of magic that might be used in the movie or if the movie focuses on their having been commissioned. The details matter here. You're probably okay in most circumstances, but this is not something we can give a generic yea or nay to. It's hard to imagine a cup being unique enough to matter legally, but then I think about Chip in the animated _Beauty and the Beast_. "Don't piss off Disney" is usually excellent advice for a writer.