Create Water Bed

You enclose up to 20 gallons of water within a thin membrane that contains the water for the spell's duration. The membrane readjusts its shape when rested on, supporting up to 300lbs before bursting. Without any added weight, the membrane slowly forms into a mound roughly 1 inch in height per gallon of water. The membrane collapses when the spell ends or any time the water is added to a larger body of water. The membrane can also be destroyed if it takes any piercing or slashing damage.