A method includes wrapping one or more pieces of fabric around at least one piece of shape memory material. The method also includes attaching outer edges of the one or more pieces of fabric to other portions of the one or more pieces of fabric. The method further includes depositing liquid-impervious material onto the one or more pieces of fabric to form free-standing flexible walls and a floor of a containment structure. The floor is formed seamlessly with the walls. The wrapping could include attaching a bottom of the at least one piece of shape memory material to the one or more pieces of fabric at locations spaced apart from the outer edges of the one or more pieces of fabric. The wrapping could also include attaching sides of the at least one piece of shape memory material to the one or more pieces of fabric.