Using these Nella squeeze bottles is a piece of cake. First, open the wide - mouth bottle and fill it with your preferred condiment. Make sure not to overfill it to avoid spills. When your customers need the condiment, they can simply squeeze the bottle to get the right amount. For cleaning, you can safely put these bottles in the dishwasher. Just place them in a secure position so they don't tip over. Store them in a cool, dry place when not in use to keep the plastic in good condition. And always check for any signs of wear and tear, like cracks or leaks, before refilling and using them again.