The main problems of inhalation anesthesia may be solved by using a more perfect vaporizer that would be accurate as a plenum vaporizer, simple and low-resistant as a draw-over one. The new low-resistance vaporizers "MINIVAP" ("Pocket" 400 g / stainless steal & 300 g / Titanium and "Universal"), which are capable of dosing out anesthetics in the flow range of 0.2-15 L/min just like plenum vaporizers. The book considers characteristic features of portable Anesthesia Machines "Colibri" based on the above vaporizers, related to Breathing Circles, saving of anesthetics and gases, Auto-Analgesia and compatibility with medical Gas sources (Mixers) and Automatic Ventilators. Due to the low-resistance and virtual independence from fresh gas flow rate, temperature and ambient pressure, "MINIVAP" vaporizers are instantly adaptable to needs of on-site emergency surgery, military and urgent situations, remote areas, veterinary anesthesia and more sophisticated demands of a general/district hospital. The smallest vaporizer "MV-20/I" and the most powerful "MV-20/S" (up to 10 vol% of Sevoflurane) provide effective anesthesia for adults and children as well and animals (from mouse to a horse).