Emesis containment systems, methods of use, and dissolvable charges therefor. Such an emesis containment system includes a face mask, a container for receiving vomit, an air filter, a backflow barrier to inhibit passage of vomit out of the container, and a dissolvable charge disposed inside the container. The dissolvable charge includes a surfactant that foams when contacted by liquid of the vomit. The surfactant forms a foam barrier on a top surface of the vomit inside the container to inhibit escape of gases from the vomit from the container. The dissolvable charge includes a dry pressed pellet having dry powder forms of a surfactant, absorbent particles, and a thickening agent pressed together. At least some of each of the surfactant, the absorbent particles, and the thickening agent is disposed on an exterior surface dry pressed pellet.