How to open the pumps starbucks gives you when you buy a bottle of syrup?

So I got the verisimo machine for Christmas, and afterward read taht you can make your own lattes and macchiatos from the comfort of your home with a purhcase of some syrup. when I bought it today, the barista gave me a complementary white pump for it. however, it's still beyond me how to open it or make it pop up so that I can pump it.

All it says is 'twist, with an arrow pointing in one direction, but after twisting for more than a minute I think there's more to it than that.

Anyone know the trick?
How to open the pumps starbucks gives you when you buy a bottle of syrup?
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