Both are good choices. Which one suits you comes down to how you'll use them.
| Stainless steel | Glass | |
|---|---|---|
| Stains or holds smells | No | No |
| If you drop it | Won’t break; may dent | Breakable |
| Weight | Light to moderate | Heavy |
| Microwave | No | Usually yes |
| Oven | Yes, without the lid and seal | Usually yes |
| See contents | No | Yes |
| On the go | Ideal | Riskier (can shatter) |
| Lifespan | Years; we guarantee the steel for ten | Years, if unbroken |
Choose glass if microwaving in the same container matters to you, or you want to see what’s inside, or containers mostly stay home on a counter or in the fridge.
Choose steel if the food travels — commutes, school, gym, hikes. Glass and a moving bag are a bad match; one drop and it’s gone, sometimes with broken glass near food. Steel takes the hit and keeps going, and it’s far lighter to carry.
For storing food in the fridge, both are stable choices. Glass is inert. Steel is not completely inert, and we say so plainly, but the measurable nickel transfer in the research is about hours of cooking, not storing (more on that here). The deciding factors are weight, breakability, and whether you need to microwave in the container.
One thing about glass worth knowing
In the Netherlands, a glass food container does not go in the glasbak. That bin is for verpakkingsglas — bottles and jars. Heat-resistant glass has a different melting point and disrupts the recycling process, so it goes in the restafval and is incinerated. That is Milieu Centraal’s guidance, not ours. The full story here.
It doesn’t make glass a bad choice. It just means the recycling argument for it is weaker than most people assume.
Many kitchens end up with both: glass for reheat-at-home, steel for everything that leaves the house. If you have to pick one for daily, portable use, steel is the more forgiving choice.
Food should be stored without doubt.