Well the title says it all.
There were 5 of these - I'll post pictures of the other two - when I find them>> they're here somewhere..
These are cloned versions of 'Real Squish Bugs' made in 1996 by Empire Industries - about the same time I found these in a capsule machine. These may not be from the same molds. The originals have a valve on the bottom of the bug to insert slime fluid, which could ooze out their mouth. These have niether the valve or hole in their mouth.
Thanks to Bogleech for extra info!