Charlie99
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The reason for exhaling into the bottle is to replace the water you have drunk. Otherwise you collapse the bottle as you drink, then the elasticity of the bottle will cause it to expand a bit after you take your mouth off the bottle, and it will suck in some sea water. If you don't exhale into the bottle, you'll only be able to drink a bit less than 1/2 of a half-liter bottle before it gets saltwater inside.H2Andy:i know the mermaids at Weeki Wachee drink under water (yes, highly
scientific source, i know). i read somewhere that they have to "exhale"
into the bottle to force the water into their mouths.
The CapriSun foil packs collapse as you drink, so you don't have to go through any contortions.
The little cardboard juice boxes are kind of in between CapriSun and half liter water bottles in ease of use.
I drink a Capri Sun around the 60 minute point on dives that I expect to last longer than 90 minutes. I like the "sugar hit" in addition to quenching my thirst.
On shorter dives, I just suck in some seawater, gargle and spit.