Easy to use. No small parts. No assembly required. Simply suction to your breast and let the pump do the work for you as it draws your milk using suction.Especially soft and comfortable - made from 100% food grade silicone. Perfect for traveling. Cord free. Do not need to be charged or plugged in. Fit perfectly into any handbag or diaper bag. Easy to clean. Can be sterilized with any steam sterilizing system or boiling water. Dishwasher safe BPA, PVC and Phthalate free. Compatible with all Haakaa wild neck bottles. Clean after each use. Do not use bleach based detergent. Size: 4 oz (100 ml) Suction base ensuring your pump will not fall over meaning no spills! Designed in New Zealand, manufactured responsibly in China