Choosing a water bottle for your child can feel surprisingly complex. Stainless steel and plastic bottles are both popular options, and both can work well — with the best choice often depending on your child’s age, routine, and how the bottle is used day to day.
Both materials have their place — and many families use a mix depending on the situation.
Plastic water bottles: pros & cons
Why families choose plastic
Plastic water bottles are a popular choice, particularly for younger children, short school days, or active play where weight and ease of use matter most.
- Lightweight and easy for small hands to carry
- Drop-resistant and less likely to dent
- Often more affordable
- Wide range of kid-friendly designs and lids
What to keep in mind
Plastic bottles do require mindful use.
- Should not be used for hot liquids
- Can degrade over time with scratches or clouding
- Need regular inspection and replacement once worn
- Best suited for water rather than juices or flavoured drinks
When cared for properly and replaced when needed, high-quality plastic bottles can be a safe and practical option for everyday hydration.
Stainless steel water bottles: pros & cons
Why families choose stainless steel
Stainless steel bottles are often chosen for their durability and longevity, making them well suited to older children, longer school days, and warmer climates.
- Extremely durable and long-lasting
- Naturally free from plastic chemicals
- Often insulated to keep drinks cool for hours
- Resistant to odours and staining
What to keep in mind
- Heavier than plastic, especially when full
- Can dent if dropped
- Usually higher upfront cost
For many families, the longevity and insulation benefits outweigh these drawbacks — particularly as kids grow.
Insulation & temperature: a key difference
One of the biggest practical differences between stainless steel and plastic bottles is insulation.
- Stainless steel bottles often keep water cold for many hours, making them ideal for hot days and long school hours.
- Plastic bottles are lighter but typically not insulated, meaning water will warm more quickly.
Younger children often prefer lighter bottles, while older kids may value water staying cold for longer.
Cleaning, hygiene & maintenance
Regardless of material, proper cleaning is essential — but there are a few differences worth noting.
- Stainless steel bottles are less likely to retain smells and are often easier to deep clean.
- Plastic bottles require more regular inspection, as scratches and wear can trap residue over time.
Both types benefit from daily washing, thorough cleaning of lids, straws, and seals, and replacing bottles once signs of wear appear. Find our simple step-by-step cleaning guide here.
Environmental considerations
From a sustainability perspective, the most important factor is choosing a bottle that lasts.
- Stainless steel bottles often have a longer lifespan, meaning fewer replacements over time.
- Plastic bottles are lighter and require fewer resources to transport, but should be replaced once worn.
In both cases, investing in quality and using bottles for as long as safely possible helps reduce waste.
Which is better for your child?
Quick Decision Guide
Choose plastic if:
- Your child is a toddler or preschooler
- You want the lightest option for small hands
- It’s a short school day or daycare routine
- You’re looking for an affordable option
Choose stainless steel if:
- Your child is older or carries a heavier bag comfortably
- You want water to stay cold for longer
- It’s a long school day or hot climate
- You want a bottle designed to last for years
Tip: Many families keep both — using plastic for younger years and stainless steel as kids grow or for hotter days.
Both stainless steel and plastic water bottles can be safe, practical choices for kids when they’re made from quality materials and used with care.
The best bottle is one that suits your child’s needs, is easy for them to use independently, and is cleaned and maintained regularly. Thoughtful use, rather than the material alone, plays the biggest role in safety and longevity — and with Biome’s range of water bottles designed for different ages and needs, families can choose what works best for them.
Comparison table
| Feature | Plastic | Stainless Steel |
|---|---|---|
| Weight | Lighter | Heavier |
| Durability | Drop-resistant, may wear over time | Very durable, may dent |
| Insulation | Generally non-insulated | Often insulated |
| Chemical exposure | Depends on quality and care | Naturally plastic-free |
| Cost | Often lower | Higher upfront |
| Best for | Younger kids, short days | Older kids, long days, hot climates |
Related Reads
- Are Plastic Lunch Boxes Safe for Kids?
- Are Plastic Water Bottles Safe for Kids?
- Which Water Bottles Don’t Leak?
- How to Clean Kids’ Water Bottles Properly
- Best Water Bottles For School In Australia
