50 ml is a small packaging, but that also means you can take it in your carry-on when traveling. EdT fragrances are less concentrated and generally don't last all day.
From OnBuy
Givenchy Gentlemen Only 50ml Eau De Toilette EDT Spray
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GIVENCHY Gentlemen Only Eau De Toilette 50ml
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Givenchy Gentlemen Only EDT 50ml