Generally, silicone is stain resistant, especially when it is as high a quality as ours. However, very occasionally we hear about staining. It will depend on the type of food used. In our thorough almost 15 year experience we have found: The most likely time for your products to stain is within the first couple of times of use. The more your products are used, the more stain resistant they become. If you do experience early staining, rest assured the stains certainly do fade over time and eventually build up a bit of tolerance to staining. Often boiling the products in water will lift the stain. The lighter colours are more susceptible to staining, if at all. Rest assured that many, many customers love Wean Meister so much because their products still look like new after hundreds of uses and washes.