Here are a few good options we like for storing tea. Not all are rectangular, but all are airtight and opaque. • Emile Henry Citron Spice Jar, $23.95 at Cooking.com - (middle photo at top of post) • Ceramic Tea Canister, English Tea Store - $19.99 (pictured on right at top of post) • Vintage English tea tin at Etsy, $5.95 (pictured directly above) Also, if you order your loose teas from some companies, like Adagio, they'll send your tea already packaged in a good airtight tin (pictured above on the left). We love Adagio a lot; they are a good tea company to order from and their products are great. Here is one more site with plenty of rectangular tea tin options: • Bonjour Gourmet - Tea Tins Also, Google "tea tins" and "tea canisters" - you should find a huge range of additional options. Readers weigh in - what are your solutions for storing loose-leaf tea?