The grid insert consists of a hollow cylindrical design and a rectangular grid at the bottom using a 2 mm x 2 mm mesh. The round grid uses a grid with 3 mm holes instead. The double grid consists of two parts. The bottom part uses a hollow cylindrical geometry and a grid at the bottom with a 3 mm x 3 mm mesh. The top part had the same mesh pattern and could be installed 3 mm above the bottom grid. The spherical insert design was based on an ellipsoid extrusion with a perimeter of 40 mm and a central 5 mm hole. The spiral insert consisted of a spiral-shaped, rectangular channel structure with a width of 2 mm and a height of 21 mm, guiding the fluid to a central 5 mm hole. In the hollow cylindrical interior of the columns insert 18 cylindrical, 21.5 mm high columns with a diameter of 4.5 mm were arranged.