Nature's Little Squeeze pouches are designed with rounded edges for ease of cleaning, and they are dishwasher safe!
We find that the best and quickest way to clean the pouches is to use a bottle brush with warm soapy water. You can then air dry on a rack or place the cap in the zipper opening in order to keep it open, so air can flow through to dry.
Of course you can also just rinse the pouches and put them in the dishwasher. When loading in the dishwasher, it is helpful if you open the bottom zipper and keep it open by placing the pouch over one or more prongs of the top rack of the dishwasher.