This is a bubble text box vector source file.
As you see in the picture, there are four different shapes of bubble text box. Each one of the shape is unique and stylish.
This is an eps vector file, so you could change or modify this shape and color as you wish.
Vector EPS (Scalable to any size)
EPS or Encapsulated PostScript is a standard graphics file format for exchanging images, drawings (such as a logo or map) or even layouts of complete pages. An EPS file internally contains a description of such an object or layout using the PostScript page description language. It can include both bitmap and vector data. The purpose of an EPS file is to be included in other pages. Sometimes EPS files are called EPSF files. EPSF simply stands for Encapsulated PostScript Format. EPS files have the extension .eps or .epsf.