$1.25 Flashlight

Might be pushing up the budget here

https://www.amazon.co.uk/Anker-Flashlight-Pocket-Sized-Resistant-Emergency/dp/B075FTKZHG/ref=mp_s_a_1_5?ie=UTF8&qid=1537966141&sr=8-5&pi=AC_SX236_SY340_FMwebp_QL65&keywords=anker+flashlight&dpPl=1&dpID=41qrqECP9TL&ref=plSrch

I had 3 of those, and all of the lenses were loose. I used some glue to put them back, and that worked. I was disappointed, however, and have not bought more.

On all of mine, the lenses are attached to the bezel. The bezel is threaded so they are always tight on mine.