Best closed pump system?

[Tranquility]

I'm looking for recommendations please? I'd like a closed pump type to minimise the risk of ABT bacteria getting into the expressed milk.

Thanks

 

[tinkerbell13]

Funnily enough I came across an article on 'closed' pump systems today. To be honest I didn't know the difference between open and closed. I was releaved to find out that mines a closed pump - it's the Tommee Tippee electric one. It does the job although I wish I'd gone for a double pump.