Add thyme sprigs, gently muddled juniper berries and the tea bags to a mug or tea pot and pour ¾ cup boiling water over it. Steep for five minutes, then remove and squeeze out bags. Continue to let thyme sprigs and juniper steep for 5 more minutes. Strain aromatics, stir in honey and place in fridge until chilled (approx 30 minutes).
Muddle 6 blackberries and 1 tablespoon of lemon juice gently in each of two Collins glasses, softening but not pulverizing the berries.
Fill glasses to the top with ice, then add half the honey-white tea mixture. Top with blackberry seltzer water.
Forgo the traditional cherry, and garnish with blackberries, skewered and threaded with thyme.