5. Glass straws
This elegant option is great for at home but maybe not the best for traveling. Most glass straws are made of heat-resistant, borosilicate glass, and are resistant to erosion from acidic drinks. As a natural insulator, glass is a good option for those with sensitive teeth. You might not want to let kids use these, just to be extra safe, and even adults should be cautious. Glass straws are hypoallergenic, don't have a taste and are nice to clean because they're clear!
Whichever kind of straw you choose, it's important to make sure you use it correctly to get the most benefit for your oral health. Position it toward the very back of your mouth in a way that limits the number of teeth, and the amount of time, that your drink touches your teeth. Otherwise you run the risk that the straw will concentrate the flow of that drink onto just a couple of teeth, actually increasing the damage to them.
Other than that, have fun with it! Try out different kinds of straws and see what works best for you and your family, and smile knowing that you're doing something good for the environment, as well as your teeth.