The iBum Chair
Problem: photocopiers are expensive, uncomfortable, and generally can’t support the weight of an adult human. So photocopying your butt is an exceedingly difficult and potentially dangerous process.
Solution: a chair with a built-in photocopier that will automatically take pictures of your butt.
The bikini that dissolves in water
I don't think that I need to explain the utility of such a garment. It's quite obvious.
And for these feats of technology -- and countless others -- we have engineers to thank.
So take a moment to thank the engineers in your life for what they do. Jeff the Baptist, Keith Taylor, Dad, thank you for making the world a better place.