To clean plastic water bottles: (1) daily — rinse with warm water and mild dish soap; (2) weekly — soak in warm water + baking soda for 30 min, scrub with a bottle brush, rinse thoroughly; (3) monthly — sanitise with vinegar + water (1:1) or an effervescent tablet, rinse. Avoid bleach unless the bottle is labeled bleach-safe. Air dry fully before storing to prevent mould. Replace plastic bottles every 6–12 months or if they crack, retain smell, or discolour.
Key Facts
- Daily: warm water + mild dish soap.
- Weekly: baking soda soak + bottle brush.
- Monthly: vinegar (1:1) or effervescent sanitising tablet.
- Replace plastic bottles every 6–12 months.
Daily rinse (30 seconds)
Warm water + a drop of dish soap. Swirl. Rinse. Air dry with the cap off.
Weekly deep clean
- Warm water + 1 tbsp baking soda. Soak 30 min.
- Long-handle bottle brush around the inside.
- Small brush for straw and lid.
- Rinse thoroughly.
Monthly sanitise
- Warm water + white vinegar (1:1). Soak 15 min.
- Or an effervescent tablet (Bottle Bright / Milton Sterilising).
- Rinse well.
When to replace
Every 6–12 months, or if the plastic cracks, retains smell after cleaning, or discolours. Plastic degrades and can leach over time.
When to switch to steel
If you replace plastic every 6 months, a steel bottle pays for itself in year 2. Steel does not leach, does not smell, and lasts 5–10 years.
Frequently Asked Questions
How often should I clean a plastic water bottle?
Rinse daily. Deep clean weekly. Sanitise monthly.
Can I use bleach?
Only if the bottle is labeled bleach-safe. Most plastic bottles are not — vinegar or effervescent tablets are safer.
How often should I replace a plastic bottle?
Every 6–12 months. Sooner if it cracks, smells, or discolours.
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