This is the type of really simple hinge you see on a lot of small plastic boxes.

I use it as my standard hinge for any boxes or containers I make.

They work great. Little friction and very secure.

I made this quite awhile ago, but recently shared it with a friend who said I should publish it. So here it is.

Use at least two. I often use three on larger containers. Use as many hinges as you would expect to see on a normally manufactured box. No more, no less.

This can be scaled up, but it would be prudent to make a larger version of the hinge alone before incorporating it in a larger box. Sometimes they need to be slightly adjusted.