Title: KNOCK OFF VERSION! BUY THE GREY ONE!
Product review: My boyfriend has the REAL grey one which works VERY well (only $12 vs this crappy $9 one). The REAL grey one will not let you pump anymore once the air is out. Then no leaks.This black KNOCK OFF VERSION after a few pumps one would never suck the air out. Then i laid my bottle of wine on the side... and the bottle was leaking through the top!
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