Abstract: A liquid composition to be used as a rehydration drink, particularly suited for the administration to people who do heavy work under severe conditions, e.g. at high temperatures, and to sportspeople and athletes, as well as to patients who exhibit dehydration symptoms due to severe illnesses such as diarrhea or vomiting, contains per serving unit water at least 1 to 100 g of at least one carbohydrate, such as glucose polymers, maltodextrin and fructose; 2 to 2500 mg of at least one electrolyte, such as an alkali and/or earth alkali salt; 0,1 to 750 mg of at least one ammonia neutralizer, such as D,L-magnesium aspartate, L-arginine and glutamate; at least one energy enhancer, such as members of the vitamin B group and branched chain amino acids; at least one antioxidant such as .beta.-carotene, vitamin C, vitamin E and selenium; 1 to 30 mg of at least one membrane stabilizer, such as choline chloride, betaine chloride and methionine; and 1 to 200 .mu.

Abstract: A piezoelectric vibrator operating in a spreading vibration mode has a vibrating plate of permanently elastic metal. At least one main surface of the vibrating plate is mirror-finished.

Abstract: A protective cover for a toothbrush, the cover being intended for use once only. The cover has one part adapted to enclose a part of the toothbrush handle and another part adapted to enclose the toothbrush head. That part of the cover surrounding the brushing head is, if required, also constructed with brushing means having a continuous brushing surface. A cover formed in this way can also be used in combination with an ordinary toothbrush, or with a toothbrush whose brushing head comprises a suitable soft member. That part of the cover which surrounds the brushing head is substantially secured against movement relatively to the brushing head.