Pretty sure, at least for the block and sticks, it has to do with surface area exposed to air
for the tub, it's probably a combination of surface area (there is still a bit of atmosphere under the initial seal) and how it's loaded into the tub
— Warren Myers ?? (@warrenmyers) March 28, 2020
from Twitter https://twitter.com/warrenmyers
March 28, 2020 at 11:41AM
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