You don’t even need to drill it in the bottom. Our can has a hole at the top just below the rim which works the same. The air can find its way out but it can’t do the 180 degree turn around the rim especially if the bag makes a good seal around the rim.
All fine until someone puts something liquidy in your bin. Rather have the binjuice cointained.
If you put the holes about 2 cm up on the sides you get the juice contained while still getting air flow.
You don’t even need to drill it in the bottom. Our can has a hole at the top just below the rim which works the same. The air can find its way out but it can’t do the 180 degree turn around the rim especially if the bag makes a good seal around the rim.