I regularly make a Japanese side dish of fermented cabbage that's simply pressed down for a day and salted. I'd just jury rigged something up, but it finally broke so now I'm looking to see if there is an actual device I can buy. I'd like to steer clear of plastics too.
The device needs to apply a good amount of pressure and I'd like to make the pressed cabbage in large amounts, but it doesn't have to be huge (say enough for a single cabbage).