Picture insert glass coaster for favors

Do you where I can find those? I used to have a link to a site but I can't find those anymore. I am looking for a good reputable vendor. So, if you used those favors and had good experience, I would appreciate if you could share.

Also, I heard some 'horror' stories on some coasters coming broken. Can you share your bad experience also?

TIA

ive heard this website is good.. i havent ordered from them, but my sister might for my shower.. ive only read reviews on them - and girls said it was good..

coaster