When it's colder and I use less water, one full BotPot is enough for a day for me (34oz) but I typically carry 64oz just to be safe. On most of those trips I have a filter to resupply just like any other water setup. If it's hot or I need more margin I just bring extra bottles in lightweight SmartWater or similar bottles.
The BotPot doesn't really replace the need for water storage/capacity. It's more about replacing the need for a cooking pot. Most pots have crappy lids - you'd never carry anything liquid in them, and my last pot (a 900mL Toaks) had such a loosely fitting lid that I had to keep a rubber band on it when packed so things like my gas cylinder inside didn't fall out.
That was 4.4oz, and the Bot Pot is 5.2. But since this replaces a 1.2oz-empty-weight Smart Water bottle, I'm still 0.4oz lighter, and have a pot that now has three functions: water carry, cooking, and night-time heat in my sleeping bag.