Vase, made in the technique of modular origami,is not only an original product, but also has a practical purpose. Such a vase, strictly speaking, will be a vase, for example, for artificial or dried flowers. In this master class, a step-by-step assembly of the vase is presented. Also, several design options for the finished product are shown. One of the options is presented in this introductory photo. To begin with, we determine the number of triangularmodules. The presented version of the vase (without design elements) will need 725 modules. In each row of the collected vase the number of modules will be a multiple of 5 (rows from the top down 50-25-30-40-30-20). This information is given for those who want to collect on the vase any pattern. Assembling the neck The main feature of the assembly of this vase is the order. Namely - from top to bottom. Thus, the first row is a row forming the edge of the neck of the vase. The photo shows the connection of the first ten modules. Modules connect: left corner - left pocket (right corner is free). (Or vice versa: right corner - right pocket (left free)). We connect 50 modules. And carefully close the structure in a circle. The first row - the lip of the neck - is assembled. 2nd row. On the free corners of the 1st row, we put on 25 modules. (The first put on module is shown in the photo in red). 3rd row - 25 modules. Align the modules assembled in the first row. The assembly of the neck is completed by adding 25 modules to the 4th and 5th rows. From the neck of the vase we make the transition to the central(main) part. This, perhaps, is the most difficult stage of assembling a vase. The next three photos from different sides show the location of one transition module (they need 25). So, a series of transition to the central part is established (6th row): Assembling the main part We start from the side of the main part. On the transition modules, put the modules on the short side outwards (see photo). The 8th row (the first row of the main part) consists of 25 modules. 9th row - 25 modules. 10th row. The number of modules is increased by 5, that is, in the 10th row - 30 modules. To evenly distribute the added modules, 4 modules are put on as usual (white color in the photo), and in place of the fifth install two (red color in the photo). And so on a circle. 11th and 12th series - 30 modules each. 13th row. The number of modules is increased by 10, that is, in the 13th series - 40 modules. To evenly distribute the added modules, 2 modules are put on as usual (white color in the photo), and in place of the third install two (red color in the photo). And so on a circle. Rows from the 14th to the 18th - 40 modules each. 19 th row. The number of modules is reduced by 10, that is, in the 19th series - 30 modules. To do this, evenly around the circle, install 10 modules as usual (in the photo, the installation locations are shown in red). In the missed places we install not three, but two modules (one module for three corners). The 20 th and 21 rd series - 30 modules each. 22nd row. The number of modules is reduced by 10, that is, in the 22nd series - 20 modules. To do this, each module of this series is installed on three corners (in the photo this row is shown in red). 23rd row - 20 modules. 24th row - formation of the base of the vase. The module (shown in red) is inserted with the corners down. One corner of the plug-in module is inserted between the corners of the module of the 23rd row, and the other corner of the plug-in module is inserted between the modules. In total in the 24th series of 20 modules. So it looks like one row of the assembled base of the vase. The base of the vase can (and I recommend) to collect a minimum of two rows (25th row): So, the vase is assembled. Elements of design The design of the vase allowsadd a few design elements. For example ... evenly install the 10 modules in a circle as shown in the photo (one of the modules is highlighted in red): Under installed modules, install one more module: Collect the curved bar of 7 modules and insert it between the modules mounted on the vase (the added bar is shown in yellow). Install 9 more such bars in a circle. Another version of the design is shown in the following photos. This is achieved by adding in a circle three rows of modules of 20 pieces. Design, if you wish, your design options.