We drink at lot of fresh veggie juice at my job, which is wonderful, but I noticed we were using a lot of plastic straws (read, bad for the earth). Sure, we could not use straws at all, but you gotta admit that it's more pleasant to use them. So, I researched reusable straws and found a fantastic product.
GlassDharma makes Glass Drinking Straws (Made in USA). Not only are they a great alternative to the plastic we toss out, but they won't have that plastic-y taste to them, and you're less at risk to ingest plastic toxins. The best part: these straws are so durable and enjoyable, they come with a lifetime, satisfaction guarantee. If your straw breaks, they will send you a new one for free!
You have your choice of 2 sizes - one for thin drinks (water, tea) and one for thicker (smoothies). You can buy them on their website, or from a company like GreenFeet.
What makes them so strong? They're made from the strongest glass commercially available.
They are great for hot or cold drinks, since they're microwave and dishwasher safe
UPDATE: I bought these straws for work and they're beautiful!