Here is a great ice pack method for form-fitting ice around joints such as elbows and knees, or just about anywhere you need something that is not a solid block of ice. Try a bag of frozen green beans inside a t-shirt or towel. Don't put the plastic bag directly against your skin since it does get very cold.
The bag can be refrozen multiple times.
Here is a diet tip too: :)
Rather than toss them, try cooking the beans in a microwave for healthy snacks. I prefer mine with Parmesan cheese on top. The cooking method that works for me is just to drop them into any type of microwave safe covered bowl and cook for 3 minutes or more depending on the serving size. I use a top on it to create steam with no need to add water.