You can fill your Compot with any biodegradable waste from your kitchen. IE: Anything that will break down. EG: Meat, citrus, onions, oil, dairy, eggs, coffee grounds, tea and tea bags, paper towel, old nuts, pasta, bread, cooked food of any sort, wastewater (with or without detergent), milk, cream, yogurt, and anything else you can find in your kitchen that you would normally eat or throw in your council bin, aside from the obvious; glass, plastic, metal etc. So literally everything that you produce in the kitchen that is biodegradable.
Everything will decompose – even doggie doo (un-medicated preferably unless you are putting this waste by a big tree or unused part of your garden). No doggie doo in your veggie patch either.
The time it takes to decompose will just depend on the density of the food, the time of the year, and whether you are relying on all the elements to decompose your waste or just worms.
If you only want to fill your Compot with worm friendly scraps, then you need to leave out most of what I just said you could put in the Compot. It’s up to you how you want to use your Compot and what you feed it. But I find it more efficient to fill it with everything. Just do what is best for you. See other tips and tricks about ways to make it work faster.