Tantrums happen. Even to the best of us. The problem is when we feel our only options as parents are to ignore or give in. That isn't true. We need parents to know how to effectively handle tantrums for long-term emotional growth.
I present an article from someone far more knowledgeable than I when it comes to pumping. Tanya Allsop runs The Breast Pump Review Site which provides reviews and tons of information about anything and everything you need to know about pumping.