Twin neck bottles for agricultural liquids feature a built-in measuring chamber, which allows for accurate dosing of pesticides, fertilizers, and other chemicals. They are most commonly made from HDPE (High-Density Polyethylene) plastic for durability and chemical resistance. ⁕ Storage chamber:- This is the main, large compartment that holds the bulk liquid. ⁕ Measuring chamber:- A smaller, calibrated chamber is connected to the storage chamber via an internal tube. ⁕ To use:- You remove the cap from the smaller measuring chamber and gently squeeze the main bottle. The liquid is siphoned into the measuring chamber, filling it up to the desired level on the scale. ⁕ To pour:- The pre-measured liquid can then be poured directly from the dosing chamber, eliminating the need for a separate measuring cup.