A wide range of waterproof containers may be used for indoor composting with plastic or metal being the most popular choice. It is best to have air holes drilled in the lid or around the top of the bin. If the bins are
to be stacked to save storage space the air holes should be drilled in the sides near the rim rather that in the lid. Drainage van be though holes in the bottom or a drainage tap can be fitted near the at the base of the bin. If drainage
holes are used the bin will need to be sit on feet to allow drainage in a flowerpot saucer to catch the leachate. This should be emptied regularly to avoid odours. I also fit an inverted flowerpot saucer inside the bin with larger drainage holes to prevent
the compost blocking the drainage holes in the base. Small pebbles can also be used but these are less easily cleaned.
The most used containers are :
Stackable plastic storage bins. These
containers have the advantage of being available in a wide range of sizes so it should be relatively easy to get a lidded bin or a suitable size for the space available. It is better to have a bin that can be filled, sealed, and set aside fairly frequently
to avoid smells. A 5 gallon or 20l container is commonly used but larger containers of up to about 40 litres and even dustbins can be used. However, the larger the bin the heavier it will be to move.
with lids: While any lidded bucket can be used. “Nappy” buckets with flat lids are recommended if the bins are to be stacked when full.
To prevent fruit flies and other flies from escaping
from, or getting into, the bin through the air holes, they should be kept small or cut close together, and covered with a piece of nylon screen, fine mesh garden netting or fine weld mesh. glued to the inside of the container.
I keep my indoor bin and the drainage tray in a small dustbin to contain any escaping critters be they worms or fruit flies. However, in over five years or keeping an indoor bin in the garage I have only had worms escaping once
and that was when I failed to refit the lid correctly.
The container can be kept in any suitable room preferably with an easily cleaned floor and in a position where it will not form a trip hazard.