Pinq Polka hot and cold packs can be used when you have an injury, ache, or pain. The unique design targets sore areas and helps ease the pain. Use our hot and cold packs on your knee, back, elbow, and more. Our hot and cold packs are gentle, soothing, and useful when you need instant pain relief. Hot & cold reusable ice bag for pain relief cold therapy reduces swelling and bruises and offers instant pain relief when dealing with acute and chronic pain, back pain, neck and knee pain, post-surgery, or sports injuries. This multifunctional hot and cold ice pack can be applied to hold ice cubes to apply an ice compress or hold hot water to keep warm, or apply a hot compress. It is handy and goes a long way. Just sneak it into your bag and travel.