The protective walls
The air pressure inside the water bottle helps to maintain its shape and prevent it from collapsing as water is consumed or as external pressure is applied to the bottle. Additionally, the air pressure helps to keep the water inside the bottle from leaking out.
A tennis ball will float in water because it is less dense than water. The air inside the ball helps to keep it buoyant on the surface of the water.
the water sits inside your lungs .
Mud pots keep water cool in summer because the porous material of the pot allows for evaporation to occur on its surface. As the water evaporates, it absorbs heat from the surrounding environment, cooling down the water inside the pot. This evaporation process helps regulate the temperature of the water and keeps it cooler for longer periods.
To keep their water inside.
yes i have coating to put inside a 3200 gal water tank to keep it from rusting
They have like this nectar or this water inside them to keep them hydrated
the walls keep water inside
The water inside the bottle would freeze.
They simply store the water inside of them to keep hydrated.
to keep out the water. the oily fur helps keep warmth in and water out!
No it helps keep them warm though!