Gaining

Just google how to make a beer bong, that should serve whatever purpose you have.

Tube goes just past the lips, nothing down the throat or anything... works really well, not dangerous or painful.

When you use the funnel, be sure she swallows. There was a story on the net and some news outlets about a guy who "chugged" eggnog. I didn't swallow and just tilted his head back and let the "nog" flow in. It ended up in his lungs! It took him a day or two realize why he felt so bad. He ended up in the hospital with double pneumonia! He won fifty dollars in the chugging contest. Just be careful.