[whatshisface]

The beaker example is the worst one, because the shape of the beaker is meant for controlled pouring out one point and no spills anywhere else around the perimeter. A drinking glass is designed for sipping which is completely different. If you tried drinking out of a beaker the flanged opening would tend to make the beverage pour down either side of your mouth.

[throwawayboise]

It's also sort of a bad idea to normalize drinking out of laboratory glassware. Granted your home is different from a real lab, but lab workers have died drinking something they thought was water.

In my dad's lab in the 1970s, they used to make coffee in a large Erlenmeyer flask and filter it under vaccuum with a Buchner funnel. The safety director eventually banned it and made them buy a Mr. Coffee.

[BeFlatXIII]

I wonder how many undergrads will disassemble their bongs made from spare bits of chemistry glassware after reading your warning about drinking from lab equipment.