They are made
Combine with molasses and candle wax in your bread pan. ...
Heat the mixture for 30 minutes at 260F.
Not for me
The new way of making paper logs looks interesting. 50% saw dust and a bit flour.
The original ones were dire. Huge amount of Ash and bugger all heat.
I collect coffee grounds. My own are used sparingly in the compost bin. The ones I collect from the coffee shop i will save till next year and put them under the borlotti beans. Hopefully it will stop the slugs eating the tops of the plants. I don't put them out till there a foot high but thats what they go for. Basta***
Slugs aren't frightened by coffee grounds, I tried that. If your bean patch is small enough use Dr Volts, the slugs really do not like current flowing through them.
Make a frame from rough sawn 1x1 or whatever you might have handy, it will surround the patch. Buy a small roll of NONE enameled wire of whatever diameter is cheap, 0.5mm is usually cheap. Buy a PP3 battery connector, 50p aliexpress and scrounge some hammer in staples or a stapler gun, oh and a PP3 battery.
Make two wire tracks and staple down about 15mm apart along the perimeter of your wooden frame, you have to angle the staples if you use a staple gun so they don't track across to the other track.
Fit the connector with crimps, solder, even just twisted and taped to the ends of the two tracks, inline red or blue crimp connectors are good if you don't have soldering gear.
Fit battery and sit back knowing that all season there will be no slug or snail invaders, this method is tried and tested. The battery will barely use any energy, mine are fine for a second season if they aren't subject to many cold nights. They don't look too pretty but your bean plants get to live.