Awsome work, Ighalli!
Right now, healing liquid can save you early in the game, but teleporting and then healing is still strictly better, because you don't give everyone free turns to crit you. Only removing the ability to use healing liquid in emergency would screw everyone who has found a bottle of heal, but no tele scroll or wand yet. I think slower comsumption plus ability to dump liquids on your head is the best solution. You'll drink more reasonably, but still be able to emergency heal.
Wand or resurrection does not heal, IIRC, only grows new limbs if you've lost any.
And dumping lumps from tins sounds nice. The only nicer thing would be to put lumps into tins.
But there was a lot of discussion about this being too powerful (all the food you could easily save for later).