Military Rations Pill

are special pills that replenish one's stamina and chakra and nourish the body. It's made up of powerful stimulants and nutrients, said to allow the user to keep fighting for three days and three nights without rest.

Trivia

 * These pills are based on the real military rations pills used in Japan, mainly during the Sengoku period (mid-15th – early 17th century). They were made from rice, various flours, dried vegetables and fruits, seeds, and various other ingredients.