The trap does the job and is multi-purpose.
You fill it with water halfway and empty the sachet with the bait. You should keep it away because it smells very bad, but that's logical because it attracts flies.
So, firstly, you keep it away because it smells, and secondly, you keep it away because flies go there and get trapped, not in your house.
When it fills up, you throw away the contents, refill it with water, and add new bait.
However, be careful, I advise you to wear a mask when handling the jar because, as we said, it smells very bad (don't forget that we are talking about foul-smelling bait and decomposing fly carcasses) and also wear gloves so that you don't get any juice on you!
Ideally, throw away the contents in a sewer or at least in a double bag and seal it well!
Refill with water from a bottle or from the yard, do not use water from your house faucet because it might splash and cause odor and bacteria.
The photos you see are after 2 days of use, some are floating, others are submerged and not visible, and others have not drowned yet