The upgraded micron-mesh design traps the finest tea particles with surgical precision, eliminating unwanted sediment from your brew. Each infuser features a slim threaded lid that screws on securely, creating an airtight seal that contains all particles during steeping. The included mini drip tray prevents spills and protects your countertops. Crafted from food-grade 304 stainless steel, these infusers resist rust and oxidation, eliminating any metallic aftertaste and ensuring pure, unadulterated flavor extraction cup after cup.