Fusion 360 was like a Trojan horse for me. At first I was like "Oh shit this looks way more user friendly than Free CAD." Boy was I wrong. I HATE this program. Too much clicking, seems like something is always selected or trying to edit itself or something. I didn't enjoy tinker CAD but Free CAD honestly was nice it's simplistic and can be as precise as you want it to be.
You said flask so I raise you one, big fat flask/vase thing with swamp water in it. yeah.