Well, the volume of a regular aluminum soda can is 375 cm^3 [1]. A modern can is about 15 grams of aluminum.[2] Just a really quick plugging it into Wolfram Alpha, the volume of 15 grams of aluminum is about 5.6 cm^3. [3]<p>So, that&#x27;s about 1.5% aluminum by volume. So a soda can is about 98.5% air by volume.<p>[1]: <a href="http:&#x2F;&#x2F;jwilson.coe.uga.edu&#x2F;emt668&#x2F;emat6680.folders&#x2F;howard&#x2F;volumeof12ozcan&#x2F;volumeof.12.oz.can.html" rel="nofollow">http:&#x2F;&#x2F;jwilson.coe.uga.edu&#x2F;emt668&#x2F;emat6680.folders&#x2F;howard&#x2F;vo...</a><p>[2]: <a href="http:&#x2F;&#x2F;aluminium.org.au&#x2F;FAQRetrieve.aspx?ID=45688" rel="nofollow">http:&#x2F;&#x2F;aluminium.org.au&#x2F;FAQRetrieve.aspx?ID=45688</a><p>[3] : <a href="http:&#x2F;&#x2F;www.wolframalpha.com&#x2F;input&#x2F;?i=15+grams+of+aluminum+to+volume" rel="nofollow">http:&#x2F;&#x2F;www.wolframalpha.com&#x2F;input&#x2F;?i=15+grams+of+aluminum+to...</a>