I am absolutely in love with my HOT GLASS SYSTEM 130 ML / 5 OZ Double Wall Tea Glass with Permanent Filter and Hat. Purchased at Wing Hop Fung in Los Angeles’s China Town at nice discount, this is by far the best single serving method I have come across to prepare my fine Chinese teas. All the beauty and convenience of a double wall glass with the performance of a gaiwan. It’s simply genius in design and I can’t say more positive things about it. I was happy to see David at Verdant is carrying their filter system as part of his 2012 X-mas gift set. Good choice I say!