Glass Straws vs Metal Straws: Which Reusable Straw Is Better?

Stainless steel wins for travel and durability, while glass wins for taste and visible cleanliness; neither belongs near young children.

The right pick between glass straws vs metal straws comes down to where you’ll use them, not which one looks better on a shelf. Stainless steel survives drops, bags, and countertops. Glass lets you see every bit of residue and never adds a metallic note to your iced coffee. Both are safe food-contact materials when properly made and cleaned — the German Federal Institute for Risk Assessment (BfR) confirms as much in its review of plastic-straw alternatives. Here’s what separates them, based on the BfR’s safety review and reporting from the BBC.

Which Material Lasts Longer In Real Use?

Stainless steel handles drops and daily handling far better than glass. The BBC’s reporting notes that metal resists breakage, which is why it travels well in bags and cars. Glass can shatter on impact, and the fragments pose serious mouth or ingestion injuries — a risk the BfR flags explicitly. Durable borosilicate glass lowers that risk but never removes it. If a straw lives in your car, your gym bag, or a household with hard floors, steel is the safer bet. Glass rewards the careful drinker who keeps a straw at a desk or kitchen table.

Does Glass Or Metal Change How A Drink Tastes?

Glass is generally neutral and chemically inert, so it adds nothing to a drink’s flavor. Stainless steel is a safe food-contact material too, but some people pick up a metallic taste, and the BfR points out that alloy quality and specifications vary between products. Temperature matters as much as flavor: metal conducts heat and cold quickly, so a steel straw can turn uncomfortably hot in tea or painfully cold in ice water. Glass stays gentler on the lips, though borosilicate glass still reacts to abrupt temperature swings — do not drop a cold straw into boiling liquid. If sipping comfort and flavor purity top your list, glass edges ahead; for a straw you can toss in a backpack without a second thought, the decision flips.

What Matters Most For Cleaning And Hygiene?

Inadequate cleaning of the narrow internal channel is the real hygiene risk for both materials, not the material itself. The BfR is blunt: every reusable straw must be cleaned thoroughly before each use, and if you can’t guarantee that, it recommends skipping reusable straws entirely. A sound routine works the same for either material:

• Rinse right after drinking, especially after sugary, acidic, dairy, or pulpy drinks.
• Scrub the full internal length with a dedicated straw brush.
• Wash in hot water with detergent, then rinse well.
• Let the straw dry completely before storing it.
• Check glass for chips, cracks, or sharp edges, and discard it if damaged.

Glass has one quiet advantage: you can see whether the inside is actually clean. Steel’s smooth surface washes easily and is often dishwasher-safe, but its opaque walls hide residue until you look closely. Dishwasher compatibility varies by manufacturer, so follow the product’s own instructions rather than assuming. Shopping for a set? Browse the glass straws we’ve tested and recommend to compare borosilicate options side by side.

When Should You Skip Both Materials?

Neither rigid material suits every situation. Skip glass and metal during running, fast walking, driving, or anything where a sudden jolt could jam the straw against your mouth. The BfR’s advice applies to both: keep rigid straws away from unsupervised young children, since a fall can push hard glass or metal against the mouth or teeth.

Retire any straw showing damage. Chips, cracks, dents, corrosion, or a broken weld all mean it’s time for a replacement — and treat a dropped glass straw as damaged even if nothing looks wrong, because impacts can create weaknesses that fail later. When you buy, check that steel straws meet food-contact specifications rather than assuming all metals are equal. The BfR notes metals and alloys are appropriate when they meet applicable Council of Europe specifications, and the BfR’s straw materials review lays out that standard in full.

Bottom line: keep glass at home where careful handling is easy, keep steel in your bag, clean both like kitchen tools, and replace anything that shows wear.