USB Stick recommendations: key-ring and pocket-friendly

[chalmers]

I'm looking for recommendations on a USB stick that is key-ring friendly. To me, that means a very sturdy ring hole (metal body, maybe?), is retractable or flip to cover (no detachable caps, they get lost). Capacity would be 32GB+, USB3.0 preferred, but not required.

If retractable, I'd prefer something that protects the pins when retracted, ie, a cut-out design with no top half of the USB dongle, like below. To keep the lint out of the dongle.



All for $10.

Just kidding, I don't mind paying a reasonable premium for these features. Fire your suggestions my way!