Why do my water bottles smell bad

Plastic bottle stinks permanently or occasionally

Trust in manufacturer information required

Plastic bottles are products for which the buyer and consumer normally have no further knowledge about which type of plastic was used in the manufacture. Similar to children's toys, the spectrum ranges from low-quality raw materials with a high proportion of plasticizers to high-quality, sealed and recyclable branded products.

If a plastic bottle is to be used regularly for drinking, an "odor control" is urgently recommended before buying. The suitability for different content should also be checked. Some types of juice, such as those with citrus fruit, attack the inner walls of plastic bottles relatively aggressively. This can be the cause of a stench that can no longer be removed.

If the stench persists or increases, dispose of it consistently

A plastic bottle must not come into contact with aggressive agents when cleaning. The plastic in branded products is sealed on the surface. If the seal is damaged, components of the plastic that develop the typical plastic odor can escape. Contents that are too hot can also trigger this effect.

Since the evaporation of ingredients increases in heat, the recommended home remedy is to cool a smelly bottle or freeze a plastic bottle. This procedure prevents the stench for a short time, but leaves the cause untouched. In general, the perception of a smell should be rated as a sensory warning. With a new plastic bottle for multiple use, the inherent odor must evaporate more strongly with each cleaning. Otherwise the plastic or PET bottle should be disposed of.

Criteria for preventing and avoiding odor development

  • Odorless inside and outside is a sign of quality when new
  • The more elastic the plastic bottle, the more potentially “smelly” plasticizers it contains
  • Brand manufacturer guarantee reduces the likelihood of stinking
  • Exclude adhering dirt residues as a source of odor
  • Visual and tactile control whether the plastic surfaces are homogeneous
  • Test seals such as CE or TÜV increase the probability of odorlessness
  • Always allow plastic bottles to dry out safely and completely
For beverage bottles made of plastic, you can pay attention to the note "food safe". The plastics permitted for this use normally only smell if they are not properly cleaned.