I tried filling the jug from the bottom end because that makes sense as it “connects” better there.
But no.
Also:
Or you know, do away with the whole “jug/cup/thermos” on the ground bit and just make a “drinking faucet” that can attach to any drum/pipe to where you can use it to drink whatever is inside.
Even if that thing you are drinking is molten tungsten.
EDIT: And to be fair, drinking from a jug that sits on the ground… What are we? Ant eaters with straw shaped tongues?