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Can Cup Color Change How Coffee Seems to Taste?
What two latte experiments found about white, blue and clear cups, and how to choose a mug or compare coffee fairly.
Quick Answer
Yes, cup appearance can affect how coffee tastes to the drinker. In two small latte experiments, it changed flavor-intensity ratings in one and sweetness ratings in the other. Enjoy a favorite mug in everyday use, and use matching cups when comparing coffees.
On This Page6 Sections
What the Coffee Experiment Actually Found
The 2014 study by Van Doorn, Wuillemin and Spence compared these setups:
| Study setup | Reported result |
|---|---|
| Experiment 1: 18 volunteers. White and blue ceramic mugs and a clear glass mug, with slight physical differences. | Higher flavor-intensity ratings in white than clear. |
| Experiment 2: 36 volunteers. Identical glass cups with a white sleeve, a blue sleeve or no sleeve. | Lower sweetness ratings in white than blue or clear. Intensity did not differ significantly. |
Intensity and bitterness were rated separately. Neither experiment found a significant bitterness difference.
Expectation and Tasted Experience Are Different Questions
A prediction before sipping and a rating after tasting are different responses. The 2014 study recorded the latter; our coffee-bag design article covers expectations about an untasted product.
Visual contrast and learned color associations are possible explanations, but the study did not settle a mechanism. It measured taste ratings, not sugar or caffeine content.
Match the Comparison to Your Question
- To compare coffees: Use matching cups with comparable preparation, portions and serving temperatures. The home coffee-tasting guide gives the full routine.
- To choose a mug: Use your normal coffee and consider the whole experience, including appearance, rim and comfort.
Make a Fair Comparison at Home
For a personal comparison of cup appearance:
- Divide one prepared batch equally between clean cups that are as similar as practical apart from appearance.
- Keep the fill level and drinking temperature comparable. Sip each and write a brief note.
- Record which cup you tried first. If the result would affect a purchase, repeat on another occasion with the order reversed.
Record what you notice, including no difference; with the cup colors visible, this remains a personal comparison. The flavor-note guide helps put words to your impressions.
A personal note: I care about the cup as part of enjoying coffee: how it looks, how the rim feels and whether it is comfortable to hold. Those things belong in my choice of a favorite mug. They also make me cautious about treating an impression as the effect of color alone. I like keeping the two questions separate. Choosing a cup is about the whole experience, while comparing coffees calls for more consistent vessels. That distinction lets me enjoy presentation without asking it to explain every sweetness or intensity note I notice.
Sources
- Van Doorn, Wuillemin & Spence (2014), Does the colour of the mug influence the taste of the coffee? Flavour 3, 10.
- Figure 4: © 2014 Van Doorn et al., reproduced in full and converted to WebP from the authors' original image, CC BY 4.0.