When a drinkware page names a material, it is usually describing one of three different things, and the page rarely says which. It can be the body, which is what holds the liquid. It can be the coating, which is what your hand touches. Or it can be an additive mixed into something else at a concentration the buyer is never told. A claim is only useful once you know which of the three it is.
The three, and how to tell them apart
| What is named | What it means | The question that resolves it |
|---|---|---|
| The body | The vessel itself is made of it | Which surfaces contact liquid, inside and out? |
| The coating | A layer is applied to a body made of something else | What is under the coating, and what is the coating made of? |
| An additive | A small proportion is mixed into a material | At what proportion, and what does the finished article test to? |
Taking the common claims one at a time
None of the claims below is automatically false. The point is that each one is a question with a document behind it, and the document is always about the finished article rather than the raw material.
- Graphene. Most often an additive or a thin coating rather than a body. The useful request is a material declaration and a food-contact test report for the finished article, because a safe raw material says nothing about what it becomes after curing.
- Titanium. Genuinely a body material on some articles, and a coating on others. Ask whether the interior surface is titanium as well, and whether the lid and the gasket are, because a titanium shell with a plastic liner is a different product from a titanium vessel.
- Ceramic. On a steel bottle this is almost always a coating, not a fired ceramic vessel. The question is its composition and its food-contact status, not the word.
- Antibacterial or self-cleaning. A claim about a standard and a test report. Ask which standard, and read the report.
- Keeps cold for a stated number of hours. Ask at what ambient temperature and at what fill level, because both change the answer more than the coating does.
The mechanism is still the vacuum
It is worth saying plainly, because the material language is designed to obscure it: on any insulated article, what keeps a drink hot or cold is the vacuum between two walls, not the surface treatment. A coating changes how the bottle feels, how it wears and how it looks. It does not change the insulation. The single-wall comparison sets out what the vacuum is actually worth.
What we publish, and what we will not
This site names the steel grade and the standards we hold, and it lists the decoration and finish routes with what each one suits. It does not publish per-article weights, and it will not print a performance number for a configuration nobody has measured. That is the same rule the rest of the site follows, and it applies to a material claim exactly as it applies to a price.
Questions buyers ask
Is a coated bottle worse than an uncoated one?
Not inherently. A coating is how most colours and most textures are achieved, and the durable route is a cured powder coat. The failure mode to guard against is adhesion, which is what the limit sample and the incoming material check exist to catch.
Which steel grade should I specify?
That is a real engineering question with a real answer, and it is not decided by marketing. 304 against 316 is the comparison that matters for most drinkware programmes.
How do I compare two suppliers making the same material claim?
Ask both for the declaration and the test report for the finished article, for the market you are selling into. The supplier who has them answers quickly.
The finishes and decoration routes this site offers, and what each one suits, are set out on the customisation pages. To put a specific claim against a specific configuration, a technical enquiry is the shortest route.
