“We treat tea like fashion,” says DavidsTea cofounder David Segal. “We change it up seasonally.” Summertime means Just Peachy, Watermelon Mint, and Sangria (non-alcoholic, of course). Tea devotees can buy any of the 150 types by the ounce, or order a hot or iced brew in store. Segal’s goal in this Montreal-based company is to make tea more accessible. That might mean having a Tea Pop, a cold, more concentrated tea drink served with sparkling, instead of still, water. Knowledgeable staff encourages sniffing and sampling (ask about the garden-to-cup program as well as nose-to-cup transfer). “We want the tea you smell to be the tea you taste,” he says. Customers will find English breakfast and other standards at the brightly colored shops, but why go basic black when you can really mix it up? DavidsTea, 661 Tremont St., South End, Boston, 617-585-9534; 298 Washington St., Downtown Crossing, Boston, 617-292-0098; and 33 Boylston St., The Street Chestnut Hill, Chestnut Hill, 617-277-1832; or go to www.davidstea.com.