new orleansbased theodent makes toothpaste that successfully substitutes for fluoride a blend of minerals including cocoa bean extract. the &ldquochocolate toothpaste&rdquo is housed in a sophisticated tube, whose angular shape and shallow depth afford a sleek yet professional appeal.  the tube is a fivelayer coextrusion that includes evoh. the head of the onepiece tube is triangular in shape, with dramatic hard edges punctuated by one of the most complex caps ever commercially produced.