Approaching investors for $75,000 is no easy task — especially when you’re on ABC-TV’s “Shark Tank.” Yet, when Marine combat veteran Rob Dyer presented them with the caffeine-free nutritional supplement RuckPack, two of the investors “bit” at the offer. The shot was created on the battlefield in Afghanistan by Special Operations Forces Marines to withstand the rigors of war, Dyer said. In the end, panelists Kevin O’Leary and Robert Herjavec each invested $75,000 for a combined 20 percent of RuckPack’s parent company, Noots! Nutrition.