Can anyone with the MAM manual breastpump tell me what diameter the breast shield nipple funnel is in mm, as well as how comfortable it is ect-what your thoughts are on it? I am looking for a nice manual pump just something extra to try around with. I like to get creative with my expression as I find I produce more milk when I express in varying ways, electric pumping, hand expressing and so forth so I thought adding in a good comfy manual would help too but I want to make sure the diameter of this is going to fit well with my nipples before purchasing.