Choosing the right joint technique for your box design largely depends on the material, purpose, and aesthetic of the box. Here’s a guide to help you select the most appropriate joint:

• Finger Joints: Ideal for connecting two pieces of wood at right angles. They provide strength and a pleasing appearance, making them suitable for decorative boxes and furniture.
• Living Hinges: Perfect for designs that require flexibility and durability. These are typically used in plastic boxes that need a hinge allowing the lid to open and close without separate hardware.
• T-Slot Joints: Best suited for modular designs. This technique allows for easy assembly and disassembly, making it ideal for boxes intended for transport, or when you want to change configurations regularly.

Consider the material you are working with; for example, finger joints are more common in wood, while living hinges are best with plastics. Evaluate the functionality of the box—does it need to be opened frequently? Lastly, think about the visual design. The joint should complement the overall aesthetic of your box. Testing out a few techniques through prototypes can also help lead to the best choice.