Indonesia
When I think of an easy, crowd-pleasing thing to bring back from Indonesia, batik shirt is a good pick because it does not need much explanation when you hand it over. I would avoid the obvious tourist print and look for something with a local pattern, fabric or cut that still works with normal clothes back in the UK. I would rate it higher when it is locally made, clearly labelled and easy to use at home, and lower when it is just tourist packaging.
Indonesia
Famous Indonesian coffee style; verify ethical sourcing before buying.
Indonesia
This is exactly the sort of thing I like bringing back from Indonesia: small enough to fit in a bag, but specific enough to remind you where you bought it. The best version is usually the sealed jar, tin or packet from a normal supermarket, spice stall or food hall, not the most expensive tourist version. It is also the kind of thing you can talk about when someone asks what you brought back, because there is usually a little story attached to where you found it.
Indonesia
Tempeh chips is worth adding because it feels like something you actually noticed while travelling through Indonesia, rather than a generic souvenir. I would buy a couple of packets: one to open while travelling and one to bring home unopened, because snacks have a habit of disappearing before the flight. The ideal version is modestly priced, not too bulky, and good enough that you would buy it again even without the holiday memory.