This is definitely not a necessity but it is a fun little addition to have in your cupboards. Its more compact and easier to travel with than a normal sized shaker bottle. It's good for when you don't feel like washing that old shaker bottle you left laying in your sink for hours and need to just get in a little bit of whey or whatever nutrients you need.
It is 9.5 cm by 16.5 cm and can hold up to 400 milliliters. Comes in 4 colors. (Black, Green, Blue, Red)