Brita has a larger carafe model we use in our camper because of just the capacity you describe, John. I don't like it at home, where I find it too big and heavy for the water-bottle use that's the main home use. In the camper I pour off into a plain counter-top tank we already had. There is an even bigger Brita tank style, I think it's 2 gallons, with a flip-spout like on some water cooler. My MIL has one and it works great; a little harder to clean if the sink is small but plenty of capacity.

That smaller home unit BTW (2 qt.) has a filling reservoir exactly the same capacity as my water bottle, so it's pour one and refill the other, plus the extra prior-filtered amount left behind if I haven't filled last time and want to fill a bottle. I keep a spare 1-qt. pitcher by the sink in case the sink itself is too full of dirty dishes to fit the carafe under the faucet.

Nice thing about the Brita, too, is all the filters are the same size: only the carafes and tanks vary.

~Susan