Disclosed is a handy bottle capable of absorbing deformation strain caused by variation of capacity, which is easy for lifting up and carrying because of its recessed portions for gripping and is excellent in dropping strength and capable of preventing the buckling phenomenon while maintaining moldability and lightweight property as well as a process for producing the handy bottle. The chair parts are fixed relative to each other when a pin associated with the body engages in one of several apertures in the sliding member to fix the chair parts. The block provided with the heater and the other block are brought into contact with each other to preheat the other block before introducing the dry analysis element therebetween. By this means, a low cost conventional MZ modulator can be used to perform complex modulation of the E-field of the optical carrier. In particular, the field plate comprises a layer of plural metallic regions which are isolated laterally from one another by spacing so as to assume a lateral electric field profile which is established by a volume doping gradient in the silicon drift region.