I grab for a funnel several times a week. To pour the newest batch of home fermented Kombucha into the Grolsch bottles, ground flaxseed from the bulk bag in the freezer into the jar I keep in the fridge ... the list goes on. Wait! Did I mention that I do a lot of canning and preserving? You've got to have the right funnel for that.
The large metal, Küchenprofi bad-boy is for canning. The tapered business end fits into a wide variety of different size jars. I love it. Below it, is a collapsible funnel that fits into anybody's kitchen arsenal, and is both big and small enough to take care of most tasks requiring a funnel.
The small one on the left is perfect for really small vessels, but frankly, I don't use it a lot anymore. It could probably be retired. The newer, white one on the right came from The Reno Homebrewer. I was in there recently after some supplies for cider making, and picked it up. It's totally perfect for filling the swing-top Grolsch bottles! It has a large enough top/basin, and right size spout that fits well down the neck of the bottle.
If you're stocking your kitchen, and want the right equipment, then you need a couple of different funnels. You can order them online, of course, and at any place selling home brewing supplies. Another place to go would be your local restaurant supply house. I've been a long-time customer of Resco, here in Reno, Nevada. If you're still buying your kitchen equipment from department stores or expensive kitchen/gourmet chains, more power to you. But, the restaurant or home brew places have really helpful, friendly people - who've probably worked there for years - and you'll save a ton of money.