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Home & Kitchen

Zak Designs 13oz Harry Potter Movie Double Wall Tumbler with Lid and Straw, Made of Break-Resistant Plastic (13oz, Non BPA)

Home & Kitchen4.7· 31,683 Amazon ratings

Bias-adjusted across 31,683 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Home & Kitchen.

98.1%
Percentile · Global
97.6%
Percentile · Cohort
Home & Kitchen
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Zak Designs 13oz Harry Potter Movie Double Wall Tumbler with Lid and Straw, Made of Break-Resistant Plastic (13oz, Non BPA)

How the score was built

Amazon ratings
31,683

used for the Bayesian percentile

Raw star average
4.7 / 5

unadjusted Amazon mean

Bayesian avg
4.70

raw rating shrunk to the category prior

Reviewer-graph z
0.873

bias-corrected vs. each reviewer's baseline (0 qualifying)

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Same category · Home & Kitchen

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