This is a simple funnel to help with filling your "Self-Watering Seed Starter". I found that the water fill hole was just too small, so I modeled a simple funnel that allows me to fill the "Self-Watering Seed Starter" without spilling.
Based on the design and the Blender flies, it appeared that the water intake hole was the same size on all "Self-Watering Seed Starter" sizes. So, in theory, this should work for ALL sizes “Self-Watering Seed Starter” (1x3, 2x3, 3,3, 5,5, etc.)
The author remixed this model.
This is a funnel for filling the "Self-Watering Seed Starter" with water to prevent spilling.