the elusive Yogi Tea glass mug!

Hi all! I’m on a hunt… for a Yogi Tea mug. The branded glass one, specifically (image : http://kathsfunnylittlelife.files.wordpress.com/2012/02/claras-lovely-mug.jpg ). I’ve asked my local Yogi Teas stockist where they got them from but they don’t seem to be available commercially, at least not in the UK, and I’ve only ever seen grocery stores that stock this range use them… Any tidbits Yogi Tea fans could share please?