According to the Xbox App, the "Glub Glub" headwear is supposed to unlock when you complete the achievement "Moskstraumen" but in my case while on Windows 10 it doesn't unlock.
MCPE-86153
"Glub Glub" Headwear Doesn't Unlock In Windows 10 Edition
Resolved
Duplicate
1
Thank you for your report!
We're actually already tracking this issue at MCPE-85836, so I will resolve and link this ticket as a duplicate.
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