8 in1 UltraVite Multi-Vitamin Liquid for Hamster/Gerbil, 1-Ounce Easy-to-give daily multi-vitamin concentrate Just add to water Supplies important vitamins for proper growth and nutrition 1 fl oz bottle Easy to give daily multi-vitamin concentratejust add to water. Supplies important vitamins for proper growth and nutrition. Also ideal for sick hamsters and gerbils.