Let's clear some misconceptions:
chilly exterior: cold(er than air) gas inside
chilly with condensation on bottom: very little cryo liquid inside (common before static fires)
frosty walls: filled with cryo liquid (up to the frost lines. happens during cryo proof and actual WDRs) pic.twitter.com/Fz3seKp3mW

— Rafael (@fael097) May 9, 2020