I've been staggered by the quality of the images my Ricoh ff70 takes. Pretty much as good as my Contax T2 if the conditions are good. I got mine for £30 and although some chancers have them at BIN on eBay for £100+ if you can grab on cheaper at an auction you'll be laughing. I use it exactly as you intend - bottom of a camera bag that's chucked in and forgotten about to some extent. It's not as small as a Mju but you could still get it in a frame bag
I've got this camera's predecessor, the FF-3, and have also been really impressed with it. Dedicated flash button which always defaults to off (which was something that annoyed me with the Mju II), quick to use and seems pretty bombproof.
I've been staggered by the quality of the images my Ricoh ff70 takes. Pretty much as good as my Contax T2 if the conditions are good. I got mine for £30 and although some chancers have them at BIN on eBay for £100+ if you can grab on cheaper at an auction you'll be laughing. I use it exactly as you intend - bottom of a camera bag that's chucked in and forgotten about to some extent. It's not as small as a Mju but you could still get it in a frame bag