I'm doing some gumpaste figures and one of them needs to have a green "liquid-like" form in a bucket they're holding. melting sugar/jolly rancers was my first thought- but I need it to be in the gumpaste bucket and melting anything would be too hot for the gumpaste. I thought of jello- but they want this to be for safe keeping and I'm not sure how well "jello" would hold up in years to come lol Any thoughts?

Get the White Stokes piping gel. It is really thick and it eventually will dry out.

Is there any way that you could make the water out of the sugar/candy like you had intended in another mold and then shape the gum paste around it to make the bucket? Just a thought. Not sure how big the bucket is you are making, but maybe use a mini cupcake pan as a mold to get a small, round disk of "water" and then mold the bucket around it, or make the mouth big enough when you make the bucket to just place the disk in.
HTH

Maybe you could fill the bucket with a white or pastel blue gumpaste and then make a jolly rancher/candy "disc" that would fit on top of it...so it would give the appearance of liquid without being totally full of candy...?

Perhaps you could mold it in a shot glass and then place it in the bucket?

Funny enough- my Mom suggested gummy bears! I only had gum drops, so I tried melting a couple with a little water and it worked AWESOME!!!! Thank you everyone for all the clever alternatives- hopefully this post gave others some ideastoo!