I’ve had devices that would give me all those things:
Variable temp electric kettle, hot and ‘ambient’ (warm) water: $40 (I’ve had it since 2004, still going strong
Filtered water: Brita tank filter, 27 cup capacity: $38. Filters cost $2/month
Seltzer bottle: $33. Cartridges cost about $.50 each or less.
How long would it…