One scene from Little House on the Prairie managed to make it all the way to television with a surprisingly modern object hiding in plain sight. During an outdoor sequence near the water, the characters are surrounded by scenery meant to transport viewers back to the 1800s. But look closely near the bottom of the scene and something doesn’t belong there.

Partially hidden among the vegetation is what appears to be a modern green glass bottle. It’s easy to overlook because the viewer’s attention naturally stays on the characters, but once you notice the bottle, it becomes difficult to ignore. Its shape and appearance immediately clash with the carefully constructed period setting around it.

The series was set primarily in the late 19th century, so production crews worked hard to keep obviously modern objects away from the cameras. Costumes, buildings, wagons, household items, and outdoor sets were selected to recreate pioneer life. Something accidentally left near a filming location, however, could easily escape notice during a busy day of production.

That’s apparently what happened here. The bottle remained in the shot while filming continued, and nobody caught it before the scene was completed. Decades ago, when episodes were viewed on smaller and less detailed television screens, tiny background mistakes like this were much harder for audiences to spot.

Today, clearer copies and freeze-frame viewing make these little errors far easier to discover. So the giant blooper hiding in this Little House on the Prairie scene is the modern-looking green bottle visible near the water—a small production mistake that survived unnoticed right alongside the characters.