The invention includes a container for storing liquids, the container including a blending chamber for holding a larger volume of liquid, and an opening that can be selectively sealed or unsealed. The container also includes a sampling chamber for holding a smaller volume of liquid, and another opening that can be selectively sealed or unsealed. Fluidically connecting the blending chamber and the sampling chamber is a siphon having an upper opening in the blending chamber and a lower opening in the sampling chamber. The siphon includes a siphoning level, which is a fluid height in the blending chamber at which liquid will siphon from the blending chamber to the sampling chamber. In some embodiments the siphon is located in the blending chamber.