Abstract: A billfold or pocket wallet for carrying paper money, credit cards, identification cards and the like comprising means to carry a paper notepad and a writing utensil integrated therein. The billfold is constructed to allow for the facile removal of single sheets from the notepad and the billfold is dimensioned to be conveniently carried in a clothing pocket.

Abstract: Disclosed are cooling tubes or straws for beverages and other liquids. The tubes or straws comprise a porous matrix to effect the cooling a liquid contained within by pervaporation.

Abstract: Disclosed are cooling jackets for containers for beverages and other liquids. Such a jacket comprises a porous matrix as an element of the jacket body to effect the cooling of the jacket by pervaporation of a liquid contained within the jacket body. The jacket therefore cools a liquid within a container maintained in direct contact with the jacket.

Abstract: Disclosed are self-cooling containers for beverages and other liquids. Such containers comprise porous matrices as elements of the container bodies to effect the cooling of contained liquids by pervaporation. The liquid vapor can pass through the porous matrix directly to the environment or to a collector or trap comprising an absorbent material in contact with the container. Also disclosed are self-cooling containers incorporating insulative sleeves that reduce radiative warming of container surfaces yet permit sufficient pervaporative flux to cool containers residing within such sleeves.