The sleeves are handmade here on the Sunshine Coast, Australia, from cotton drill fabric. The sleeve is reversable so if you get sick of one fabric, simply change it to the other one.
The sleeve fit the 600ml Mason jar perfectly!
Seastraws are made out of a material called Borosilicate glass (similar to Pyrex style glass) which is a sturdy glass. We also make our glass straws slightly thicker than most other glass straws to make them more durable. However, it is still a glass product which means they are breakable so you'll need to look after them.
Yes, they both are! Simply place our reusable glass straws in the dishwasher's cutlery holder.
We normally say that if you trust your child with a normal drinking glass they're fine using a reusable glass straw. However, we always recommend supervising young children when using our glass straws, considering it is a glass product.