Patent ID: 8171705

Claim:
A method for filling a multilayer bottle with a material to be stored therein, comprising: filling said multilayer bottle with said material, wherein said multilayer bottle comprises outermost and innermost layers and at least one barrier layer interposed between the outermost and innermost layers, wherein the outermost and innermost layers are made mainly of a thermoplastic polyester resin obtained by polymerizing a dicarboxylic acid component containing 80 mol % or more of terephthalic acid with a diol component containing 80 mol % or more of ethylene glycol; and the barrier layer satisfies the following conditions (1) and (2) immediately before filling the multilayer bottle: 50° C.≦Tg≦100° C. (1) Wb≦1% by weight (2) wherein Tg represents a glass transition point of the barrier layer; and Wb represents a water content of the barrier layer as measured by a Carl-Fisher method at 230° C. for 30 min.