How to use Legendairy Milk's Collection Cups with the Duette™ Breast Pump Remove the Y-shape tubing from the membrane caps of your collection cups. You will also want to remove the adapters (A) from the Y-shaped tubing. Remove the white Duette tubing connector from one end of your Duette tubing. Connect adapter A to that end of the Duette tubing. You will need to repeat the same steps for the other side. Connect the end with the adapters A to the membrane caps of your collection cups. Connect the other end of the Duette tubing with the white connector into the Duette breast pump.
