The coffee maker "Senseo" Philips is originally designed for singles. You can prepare up to 2 cups at a time. For Senseo has a small water tank with a maximum of 750 ml capacity. For single households or 2-person households is quite sufficient. But what if you have time visit !? This (enlarged) water tank has twice the capacity of the original Senseo tanks. You can use it while still only prepare 2 cups of coffee at the same time, but if you need more than 2 cups of coffee, it makes more sense to use this tank. Because then you have to replace only the pads and can brew up to 5 cups of coffee at a time. Only then this water tank is empty and needs to be refilled. If it is full, the tank is pretty hard. So he has two handle grips on the side. I think, this tank is a very useful addition for the Senseo.