The travel tea tumbler geek Owl strikes again. Today I will be reviewing the Teabook Travel Tea Tumbler. I have used this tumbler regularly for a few months, so it has been tested thoroughly by picky owls. I bring my tea with me almost every time I go out, so my tumblers get quite a bit of use. Teabook Travel Tea Tumbler Stats 9.5oz / 280ml volume. Double walled glass body. BPA-free plastic parts. Stainless Steel Filter in the cap and is removable for cleaning. Hand Strap Extra washer included Arrives packaged securely in bubble wrap and a box Teabook Travel … Continue reading, hoot!