Yes, the contents of the warmer are safe. The warmer contains the same gel as used in commonly available hand warmer packs.
The gel is a non-toxic, concentrated salt solution (It is used as an additive in ice cream). Just to be extra safe, we have added a food grade colourant so that any leaks are visible, and Bitrex®, a safe but bitter substance that will ensure that even if there is a leak, baby will not swallow any of the solution.
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