You don't have to join the dark side to own this great drink thermos. It has TherMax double wall vacuum insulation to keep things cool. Kid-proof design: unbreakable stainless steel interior and exterior withstands daily wear and tear. It also has a hygienic push button lid with a pop-up straw similar to the thermos bottles from the 1970s. The base is non-slip and scratch resistant. Holds about 12 Oz. (355 ml). Measures about 7.5" tall, and 2.5" in diameter at the base. Fits into most metal, plastic, and soft insulated lunch boxes. For cold drinks only. Shipping Weight: 3 lbs.