This breastpump is very diverse and can be used in a lot of situations. I use it as my back up breastpump and I bring it a lot. It is not difficult to express milk and the silicone shield is comfortable. It comes with a Bottle Adaptor in case you use other bottles, i've tried using a few but the bottle that comes with it is very useful. After expressing I can either feed my bub or store it with the travel seal. I am yet to try to convert it as a sippy cup but I am excited to know it can be used for that. A good find for me!