This mug has a weight of 10 oz.(285 g) in its base. The combination of the weighted base and double hand grips makes this an extremely useful device to manage hand tremors. It is transparent to instantly show the level of contents and has a wide base to resist tipping. Do not submerge in water when cleaning this cup. Pat. Pend. This mug has a RED lid which is especially helpful to the visually impaired.