This is a perfect replacement of a plastic shaker and keep your shake hot and cold respectively. Perfectly sized for your gym bag or backpack, the 12oz Steel Shaker is a custom Blender Bottle Classic Shaker made exclusively for STEEL! The snap closure will stay sealed no matter what you put it through and is perfect for mixing anything and everything. BPA free and top rack dishwasher safe, this shaker makes achieving your goals easy, just add water and shake!