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Theoretically, a 1L flask will keep the liquid warmer as there less surface area and greater mass. However, in practise it is really a question of what size insulated (Thermos/vacuum type) flasks are available and how well they work. Non-insulated flasks will not be much good in either case I would guess your liquid would definitely cool within an hour, ...


2

Rectal infusion I have read of a case where people survived in a life raft not by drinking their own urine, but by rectally infusing urine through a tube. This is apparently quite a safe way to get your body to extracting the water in a fluid without absorbing all/too many of the potentially dangerous waste products. Turns out one of the survivors was a ...



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