SYNTHETIC RESIN MULTILAYER BOTTLE

Provided is a synthetic resin multilayer bottle capable of reliably preventing a content composed of a liquid seasoning that contains soy sauce from deteriorating due to oxygen in outside air. A synthetic resin multilayer bottle 1 includes an outer shell bottle 2, which can restore an original shape thereof in response to deformation attributable to pressing, an inner container body 3 which deforms when pressed, and an air channel 23 through which outside air is introduced between the outer shell bottle 2 and the inner container body 3. The synthetic resin multilayer bottle 1 has oxygen permeability such that, after the inner container body 3 is fully filled with distilled water from which dissolved oxygen has been removed, an inner opening part 17 is sealed, and the distilled water is allowed to stand for 60 days at a temperature of 20°C while keeping the air channel between the outer shell bottle and the inner container body open, the amount of dissolved oxygen in the distilled water is 3 ppm or less.