ONE PIECE GOLDThis is my first theory, It’s quite short but I hope you enjoy.
Well I thought about Aokiji’s ice for a while and I realized that we’ve never seen his ice being turned into a liquid and it would be just weird of he is made out of his own weakness.
His ice just emits a constant stream of vapor.
The only ice with the same properties I know of is Dry ice.
Other than water, Dry ice is made out of Co2 and it sublimes at −78.5 °C, which means it turns immediately from a solid to vapor.
This also makes him a far greater deal, since Dry ice is way cooler than normal ice.
It can cause severe frostbites and it stays solid for a longer period.
Though the question remains if the snow on Punk Hazard is made out of Dry ice also…
*Theory by SolidEye