In an area with multiple raised beds, pyramid-shaped tuteurs add much-needed structure and height—and a dash of old-fashioned ...

and nylon trellis netting. However, if you wanted to stay more true to the OP's design, you'll need to follow the directions in this explainer, which can help you make the 3D tomato cages.

Looking for a trellis in a much smaller space? Try this self-watering tomato pot with a built-in trellis to keep your plants stable and portable. The benefits of raised beds are numerous.