Question regarding Bouyancy in Water

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    Bouyancy Water
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In a discussion about buoyancy, two identical containers are compared: one filled with helium and the other evacuated of air. The vacuum container, being lighter than the helium-filled one, is expected to rise faster in water. The conversation highlights that if the envelope of the vacuum container is strong enough to withstand external pressure, it could theoretically outperform helium in buoyancy. This leads to the conclusion that a vacuum is the optimal fill for achieving maximum lift in an airship. The exploration of buoyancy principles emphasizes the importance of weight and density in fluid dynamics.
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This has been bugging me for a bit. Take two, identical, rigid containers. Fill one with helium at the level in say... a balloon? Then take the other one, and suck all the air out. Take them to the bottom of a container of water- Which will go up quicker?
 
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Assuming the vacuum one doesn't crush - it will weigh slightly less than the helium one and so rise faster.
If you could make the envolope strong enough, 'nothing' is the best thing to fill an airship with.
 
Thanks. Thought so, but wasn't sure.
 

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