Borosilicate glass. That's what seastraws are made out of. And, now you're thinking "Why would you go with borosilicate glass?". Here's why!
If you haven't read our blog post about why we decided to go for glass straws, read our blog post "Glass drinking straws over stainless steel and bamboo, any day!" first.
Now, let's move on.
To answer the question: What is borosilicate glass?
Borosilicate glass is a combination of boric oxide (aka boron trioxide), silica sand, soda ash (aka sodium carbonate), and alumina. Combining and melting these materials under extreme heat creates, what we call, borosilicate glass.
We're not claiming to be scientists here, so we'll leave the detailed manufacturing procedure to someone else. All we needed to know when researching materials for seastraws was that the structure of borosilicate glass makes it one of the most durable, temperature- and chemical resistant glass materials in the world.
"Almost ALL laboratory glassware is made out of borosilicate glass"
Did you know that almost ALL laboratory glassware is made out of borosilicate glass? To us, that means it's a pretty damn safe material to use in any area, especially great for seastraws which is used with food and drinks.
Cookware, lighting, solar, seastraws, and the list goes on!
Other areas where you can find borosilicate glass is in cookware (eg. previous pyrex), dental cartridges, lighting, optic lenses, smoking pipes, and solar thermal technology, just to name a few.
To us, no other material beat borosilicate glass in relation to durability and health safety. Our main focus when finding the perfect material for seastraws was to find the strongest and most hygienic material possible (and of course one of the most reusable-friendly and recyclable material in the world). Borosilicate glass was the perfect match for us!