These Mason Jar Sifter Inserts are a good way to become familiar with infill patterns while creating something useful.

I used these Cura settings:

• Wall Line Count = 5
• Top Layers = 0
• Bottom Layers = 0

Adjust these settings to produce varying grids for the inserts:

• Infill Density: Larger percent = finer grid
• Infill Line Distance: Small mm setting = finer grid
• Infill Pattern