The latest trend in beverage vessels are travel tumblers that keep drinks both hot and cold. I must admit, mugs like that are pretty awesome. However, the mugs with the best insulation are often quite expensive. As such, it is important to take advantage of this one-day-only deal. In it, dozens (and dozens) of insulated tumblers and bottles from brands like Takeya, Tiger, BlenderBottle, Anchor Hocking and LifeFactory are on sale. Some are nearly half off.