Oh that's some weird stuff, I don't know how one would do that in their own house though, seems like it has to be in one of those official bondage-latex places or w/e
All ya need is the special bag, a straw, a vacuum, a washcloth, and you're good to go. Trust me, she loved it. Afterwards, a bit of regular bondage, and we're both satisfied.
I'm reminded of an awful spanish pun, where your girlfriend's name is Manuela. This works because the word for hand is 'mano', and actually fits very well. However, it's late and I can't be arsed to figure the english equivalent. You folks are welcome to try though.