Hello!
I have looked through few scratch-building topics, and It is quite clear that our bits (Ork engineers especially...

) come from all the different and unexpected things/places.
I would like to share few with you.
Have a quick look below:
So from the left:
- black thing: Gatorade screw cap: for me it looks like a gatling gun...
- transparent circle: plastic cover from Pringels, really cool if you work with dry pigments...
- two red thingies below: caps from soya sause (pre packed sushi packs) nice small-medium size jet engines, or caps for walker joints...
- three bits (right bottom corner) soap dispenser. you can have one big jet and two guns or base structure for rockets/missiles...
- right top: CO2 container from John Smiths or Guinness, great as a basic strucure or base for wrecking ball...
For scaling purposes: pringels cover is little bit more than 75mm or bit more than 3 inches.
Now - please share back
Cheers