Vivonex Plus Unflavored 2.8 oz. Individual Packet Powder, 07129800 - Case of 36Elemental Oral Supplement / Tube Feeding Formula Vivonex Plus Unflavored 2.8 oz. Individual Packet Powder. Brand: Vivonex Plus. Manufacturer Name: Nestle Healthcare Nutrition. Manufacturer Number: 07129800. Application: Elemental Oral Supplement / Tube Feeding Formula. C..