This is a functional reusable cup designed in Fusion 360. The lid is knurled and has a countersunk hole to fit most metal straws. I also included the .step file so you can edit the model as you wish in any CAD design software. Both the lid and cup body are pre-tapped with 72x4 traditional ISO threads. Can be either 3d printed with food-safe materials or machined from metal or wood and properly cleaned beforehand. Please wash this cup if you 3d print it as bacteria can build between the layer lines.