This topic is about finding a convenient and portable solution for emptying an ostomy bag when a bathroom isn't available. The person currently uses a rigid container but is looking for something that can collapse flat for easier storage. Here are some helpful suggestions:

1. Consider using collapsible silicone dog bowls. These bowls often come with snap-on lids, can hold about 16 oz, and fold nearly flat. They can be rinsed or lined with a bag for easy disposal.

2. A specific product example is the "Dog Bowl Pet Collapsible Bowls, 2 Pack," which includes portable pet feeding/watering dishes with carabiners. These are available in small sizes and come in colors like blue and green. You can find them on Amazon.

3. For a simpler alternative, you might use a heavy-duty freezer-grade Ziplock bag. You can empty the pouch directly into the bag and then discard it after use.