I had to glue up a tiny lamination, about 3" x 3", so I put it in my bowl press to dry. By using a piece of wood under the lamination and spacers, it worked pretty well. I wanted to do another one, and didn't want to wait until the first was dry, so I tried to do it conventionally, by using various clamps. What a nightmare! And even worse, the glue-up wasn't as tight as I wanted.
While making the press (which can't be called a bowl press in my box book, for obvious reasons) takes a little effort, it is extremely useful for any small project that needs firm, even pressure and is susceptible to slippage. I think the picture tells it all.