I use a lot of acetone and alcohol so I buy it by the gallon. For me I always get the cans with the big caps then I just buy the fuel can kit for a couple of bucks and it is an easy fit. After use I just leave the caps off of the cans for a couple of days so there is no left overs. I have made up a lot of these for other people with my left overs, sometimes I have a lot of empty cans around. This one shown is for gas and I have another one just like it in my big flight box. I like the plastic one Joe is showing you in the half gallon, it too has a big enough cap. I find the caps on my Power Master cans too small but if you have deep pockets there is a special cap or electric fuel pump for them you can buy so you don't need to worry about filling up your after market can.