Have you ever tried to pour anything into a generic water bottle? Those powdered drink mixes end up all over the place. Other liquids miss and make a mess. Give this a try! It's a funnel, designed for the generic water bottle. With three ribs, the funnel balances on the bottle, making it much easier to combine water bottles, or add the flavored drink mix to your bottle.

Be sure to clean it up after printing. You don't want to consume any plastic. I used fine sandpaper and rinsed it well.

This may have exported in metric. Multiply the scale by 25.4 and you should be good to print.