How do you date milk bottles?

In general, you can tell the age of a milk glass bottle by looking for distinguishing marks. The majority of glass milk bottles were created in the late 1800s. Older milk bottles will have one or many of the following telltale signs of being a vintage milk bottle: Molded seams.

Why are there bumps on the bottom of wine bottles?

“The indentation at the bottom of the bottle is called the punt, for some reason even the Oxford Companion does not explain. It is common in sparkling wine bottles because it strengthens the glass against the pressure of the wine. So, then, a lot of fine wines (and fine-wine wannabes) have concave bottoms.

Why are wine bottle bottoms concave?

According to Wine Spectator, the dimple raising up the floor of your wine bottle is actually called a punt. Prior to the Industrial Revolution, all wine bottles were handmade by glassblowers, and these punts were added to ensure they could stand upright.