Best travel tea thermos with infuser?

The heat retention of the Thermos Vacuum Insulated (and leak-proof!) Travel Mug cannot be beat! I get the advertised 12 hours (with a full mug – I often make my morning tea the night before, and it’s still scalding hot the next morning).

http://www.thermos.com/products/vacuum-insulated-16-oz-leak-proof-drink-bottle-with-tea-infuser.aspx

http://www.asylumemporium.com/collections/tea-wares/products/glass-travel-tea-brewer

this is a pretty solid purchase! plus it’s glass, so you don’t have to worry about leaching