replying to toller, wai wrote:
I guess Styrofoam absorb very little amount of water , Styrofoam boxes we use
for preserve fish in to ice , every time after wash Styrofoam box I left a bit
water because I pour it not entire out of water , month by month pass ,
Styrofoam box was a bit heavier than before , it store moisture in it . sorry
my English not fluent .

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