I've been using the Pure Taste Tumbler daily and the ceramic-coated interior really does keep flavors from lingering between drinks. Coffee in the morning, water in the afternoon, no weird aftertaste. Triple insulation keeps things cold for hours, and the slip-proof silicone bottom means it stays put on my desk. The sliding shatterproof lid is simple but works well, and the easy-grip flat sides feel comfortable to hold. The two-toned color looks even better in person. BPA free is a nice bonus. Solid everyday tumbler.