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There are a whole bunch of symbols imprinted on those containers which indicate safe usage. Dishwasher, freezer, microwave, etc. Used as directed, as safe as a

• yetihehe 2y ago
  I noticed this effect on silicone tray intended for freezing water cubes. It would seem that it should be safe for freezer, but after freezing it, cubes were partly colored by silicone part of tray. I won't use silicone for freezing anymore. Those trays for baking are not that confidence-building either. Good fast test if you should buy anything for food - if it smells of fresh car or plastic when new, don't use for food.
  • pvaldes 2y ago
    The typical fresh car smell is almond wax added to the plastic. Coffe, Aloe or Avocado are also used. Transparent silicon should be more inert than dyed silicon. I assume that they should be using food grade colorants in any case.