Glass straws are the least discussed item in the reusable drinks category, and the one with the most specific care routine. They taste of nothing, which is their main advantage over metal, and they show you when they are dirty, which is their main advantage over silicone. They also have one failure mode that people rarely take seriously until it happens to them. This is what a year of daily use teaches you.
Inspect before every single use
Run a fingertip around both ends before the straw goes near your mouth. A chip at the rim is small, sharp and perfectly capable of cutting a lip or a tongue, and it is easy to miss in a dim kitchen. Hold the straw up to a light and look along its length for a hairline running through the wall. If you find either, bin it, and do not tell yourself you will be careful with it.
The myth of the unbreakable glass straw
Most reusable glass straws are borosilicate, which is genuinely tough and handles temperature change far better than ordinary glass. Tough is not the same as unbreakable. Drop one on a tiled floor, knock one against the tap while washing up, or leave one loose in a bag with keys, and it will fail exactly like any other glass object. If you look at listings such as https://netany.org/, treat the durability claims as a comparison with cheap glass, not as a promise.
Cleaning is the whole job
A straw that is not brushed is a straw growing a film you cannot see. Rinse it the moment you finish a smoothie, because dried fruit pulp sets like glue inside a tube. Then run a narrow bristle brush through, from both ends, with warm soapy water. The dishwasher alone does not reliably clear the bore, whatever the basket manufacturer suggests.
Storing them without chipping them
- Stand them upright in a jar to drain, never lying wet in a drawer.
- Keep them away from cutlery, which is what usually chips the ends.
- Use the fabric or silicone sleeve if one came in the box, especially in a bag.
- Keep a bent and a straight straw for different glass shapes rather than forcing one.
- Retire any straw with a rough end immediately, without exception.
Who should not be given one
A glass straw does not belong to a small child, and it does not belong to anyone who might fall, faint or knock into things while drinking. A straw in the mouth during a stumble is a rigid object in a bad place, and that risk is not worth a marginal improvement in taste. Silicone straws exist precisely for this, they are cheap, and they are the correct answer for children.
Thickness and length are worth checking
A wider bore is essential if you drink smoothies and a nuisance if you drink water. Length matters more than people expect: a straw that overshoots a tall jar glass by several centimetres will lever against the rim every time you set the glass down, and that leverage is what starts chips. Measure your usual glass from base to rim and buy within a couple of centimetres of it.
When they are worth it and when they are not
If you drink iced coffee at a desk every morning, a glass straw pays for itself in convenience and taste within weeks. If you drink mostly hot tea, or you have a household of children, or your day involves a commute with a full bag, this is not your product. Buying two and using them properly beats buying eight and losing half of them to chipped ends by spring.