Easy to print tomato cage, designed to be stacked as the tomatoes grow. I made a larger version and a smaller version.

I printed these with PLA because it's supposed to be more bio-compatible and less likely to leak unintended chemicals into the soil, but I can't verify that.

You'll end up spending a little bit more on plastic then if you buy a cage from the hardware store, but this will save you a trip to the store.