Oddly Wired
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perception

People who feel warm coffee view strangers as friendlier.

A 2008 study by Williams and Bargh suggested that holding a hot beverage increases the perception of a stranger's warmth, but subsequent attempts to replicate these findings have failed.

This finding is a prominent example of the replication crisis in psychology and is not considered a robust or reliable phenomenon.

Your first impressions are often based on your physical state.

Where this comes from

Study
Williams and Bargh, 2008, Experience of physical warmth promotes interpersonal warmth
What the check found
While the 2008 study did report these findings, they failed to replicate, making the claim scientifically contentious rather than established fact.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.