"This should make for a good container now." Said Wolf as he stopped heating a large part of a scorpion's exoskeleton. The chitin was molded to be more like a container thanks to his powerful flames and could be used for them to fill it up with Mia's ice before it melted and have a water supply.
With Wolf's flames being used to heat up the chitin and mold it, they were all certain that no flesh or blood was on the chitin, even if the scorpion's venom was somehow there, the powerful flames had made sure to evaporate it all.
As the party finished the battle, they made their way to the oasis. They were going to rest up a bit there and wash themselves a bit. Of course, they weren't going to get in the water and dirty it, they were going to simply scoop up water with the chitin container and use it to wash their face and armor.