Easiest 5-gallon jug for a tractor I’ve ever used:
https://www.murdochs.com/products/auto/garage-shop/accessories/fuel-cans-spouts/tuff-jug-5-gallon-diesel-ripper-jug/
Puts the whole can in the tractor in less than a minute, and you just hold your hand on it for balance. If the tractor is...