The latest example of this in my life is earphones.
I got a gift of these large pink earphones for Christmas a few years ago (not these ones but similar).
And since I started walking to college last September, I used them nearly every day. Apart from the fact that they blocked out the sound of traffic and were comfortable, the size of them meant that I found them in the mornings, stored them in my college locker during the day, and saw them again in the evening to remember to bring them with me on the walk home.
But they broke. Dunno how. The sound stopped working.
So I sourced a wee pair of earbuds that I had lying around.
Disaster.
The size and scale of the earbuds in comparison with the large pink headphones meant that I was always leaving them behind, putting them in pockets, losing them behind things in my locker. They weren't effective in my life!
I think it's interesting regarding design and intuitive design. And designed objects that get used.