In other words, the surface has to intersect itself. If one were to make a model of a Klein bottle out of glass, there would have to be a circular hole where the stretched-out, bent end intersects ...

You should definitely detect some skunk in the lightstruck beer. With clear, green or blue bottles, the glass doesn’t filter out the ultraviolet and blue wavelengths that start the skunking ...

Have you ever cracked open a bottle of beer, poured it into a clear glass and left it outside sitting in the sun? Maybe you’ve come back to it after a while to take a sip – and something isn ...

EVER wondered why beer bottles are almost always green or brown? Clear bottles for booze are a rarity – and there’s a really good reason for that. While we’ve been supping ale in the UK for ...

This was because the clear glass allowed UV rays to penetrate the beer and alter the flavour. The solution was turning bottles brown, a darker colour which would block out the rays. After World ...

But to turn glass back into bottles, you also have to sort the broken glass by color. (Clear glass is the easiest to turn back into bottles, and the most valuable product of glass recycling.) ...

Oh, beads in the plastic bag also turned colors. So, from this experiment brown glass bottles block UV light but green and clear do not. Yes. It's a simple experiment. It would be the start of a ...

but I do know it was used as a water bottle for 25 years and kept in the refrigerator. During that time, the green glass was clear. Then the bottle was retired, and I lost track of it. It has ...

The ins and outs of glass recycling aren’t always so clear. Glass bottles get broken when they’re recycled, but you don’t want to break them too soon. Other types of glass should not be ...