Ive have had bad luck with the Apacer drives, and my TwinMOS drive bent nearly at right angles. At the moment I am using 2, a Travelling Disk which looks to flimsy, but it has stood up to more than the the others, and another, which the brand has worn off and I cant remember.
I have just ordered another with larger memory. Its a Kingmax, and the drive part slides back into the body to protect the plug. So there is no cap to loose. The body looks more solid than the others I've looked at locally.