Echo 2-in-1 Ice and Hot Therapy Bag (5.75" D) | Doubles as an Ice Pack and Heat Pack | Just Add Ice or Warm Water, Close with Twist Cap, and Apply to Injured Area! 2-in-1 THERAPY BAG - The therapy bag can double as either an ice pack or a heat pack; just add ice or heated water! PORTABLE SIZE - When not in use, the therapy bag can be shrunk to a much smaller size, but when in use, it has a 5.75" diameter, big enough to cover most body parts TWIST CAP - Sealing in the cold or hot is as simple as twisting the cap on the top TWO PACK - We are now selling this therapy bag in packs of two, perfect to cover more injured areas or to use one as an ice bag and the other as a heat bag!