I bought a generic fuel can at my local Menards. Then I added one of these pumps. No issues leaving the pump on the can all the time. No lifting of the can. And it has an automatic shutoff when the tank is full. With the clip attaching to the filler, it makes fill up a snap.
https://www.amazon.com/gp/product/B01IWCP7XC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B01IWCP7XC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1