Note: 1. the temp of water shouldn't over 70 degrees Celsius/158 degree Fahrenheit.
2. this product is made of high quality PP5, this material is safe and non-toxic, if the product you received has some smell, don't worry, this is exist during the production, you can add some warm water to it and wait about 12-24 hours, the smell will gone, even though you don't add water, the material is safe to use too, you can use it righ away.