Shirt sponsorships generate Premier League clubs millions in commercial revenue every season.
According to industry estimates, last season the Premier League's clubs made a massive £260m from splaying corporate brand names and logos across their sacred sporting tapestries.
After enough hours in front of Sky Sports and Match of the Day, teams' sponsors can become branded into football fans' brain forever.
Remember when Newcastle were good and almost won the Premier League? Then you'll remember the Newcastle Brown Ale logo brandished on Alan Shearer's chest. Had a pint of Carlsberg at any point in the last two decades? It's probable Liverpool's red shirt will have flashed across your subconscious as you sipped the lager.
But beer companies aside, how many sponsors actually make an impact beyond name recognition? You might know what team a company has partnered with - but do you know what they actually do?
Test your knowledge with our quiz below.