Stainless steel blender balls. These can be placed in a shake or drink container to better mix a pre-made powder shake with water/milk more uniformly. These are great to mix Repashy, Pangea, etc Diets. These can also be used for any protein or pre-made shake.
These will fit in the wide mouth bottles you can find in my ebay store!
These are approximately 2 inches x 2.5 inches in size.
These would also work great for a cricket/roach/feeder floatation device. Simply place in a deep water bowl in the cage to keep the crickets/roaches/feeders from falling in and drowning.