If you need a large-capacity indoor can: I personally bought a 2 Liter Dramm Watering Can ... I focused on cans that were a half gallon or less for indoor plants and up to two gallons for outdoor ...

Root & Vessel 2-Gallon Watering Can - See at Amazon Best splurge: Haws The Warley Fall - See at Amazon Best for indoor plants: Fasmov Plastic Watering Can - See at Amazon Best for outdoor use ...