The Mighty Leaf Tea Top Brew Mug retails for $16.95 and is also available in gift boxes with decorative tins of your favorite Mighty Leaf teas for $24.95. I recommend the Tea Top Brew Mug & Orange Dulce Gift Set.
Disclosure: I received a Mighty Leaf Tea Top Brew Mug to review, with no obligation to write about it or recommend it. I chose to do so because it's awesome. Simple but ingenious!