Shoppers have been left perplexed by a "mysterious" rectangle on the front of Asda milk cartons.
The supermarket giant's long-life whole milk packaging features a cow in a field on the front.
Behind the cow and underneath the name of the product is a rectangle that has baffled buyers.
One person took to Reddit to question it. They wrote: "Asda milk carton has a mysterious white rectangle on the hills. Why?"
But other social media users couldn't agree on what it was, reports The Liverpool Echo.
Some thought it was a door in the middle of the field, while others assumed it was a wooden picket to hold the 'sign' with the text up.
One user joked: "Cow door. Most fields have them." Another added: "It's a door, like the one in the Truman Show. It's a metaphor signifying the caged, controlled lives of the moo-creatures."
A third, taking the issue a little more seriously, said: "It's the post holding up the sign with the large lettered MILK on..." Another added: "It’s the pole for the Asda sign with the writing on."
Meanwhile, a third shared a link to the semi-skimmed milk which showed it more clearly as part of the sign as previous commentators had concluded. In response, someone else wrote: "Mystery solved."
Meanwhile in another Reddit conversation, people discovered for the first time what the small metal studs are for on jeans.
It came after one user asked said: "These are on all jeans. Do they serve a purpose, practical or otherwise? If not, why are they there?"
Rivets, as they're called, are usually found on the front and back pockets on jeans and they're made by pressing or hammering a washer onto a metal stud through the denim.
As users learnt, their use on pockets dates back to 1872 when Jacob Davis, a tailor from Nevada, America, started adding them to the pockets of miners.
He had been buying fabric from Levi Strauss to create clothing when he discovered adding copper rivets helped to strengthen pockets when the miners were filling them with heavy tools.
Wanting to share his discovery, David wrote a letter to Levi Strauss and went on to form a partnership with them.
He received a patent for an "improvement in fastening pocket openings".
Since then, rivets have become a common feature on jeans, appearing in places where the most strain is put on the fabric to prevent seams from splitting.
