The function of a lip ice hot cold pack is to provide soothing relief and hydration to the lips. These packs are typically designed to be used either as a cold compress or a warm compress, depending on the desired effect. 

Here are the primary functions and uses:

Cold Compress:

Reduces Swelling: Applying the pack cold can help reduce swelling and inflammation, which is useful for conditions like chapped lips or after minor lip injuries.

Soothes Irritation: Cold application can soothe irritated or sunburned lips, providing immediate relief.

Reduces Redness: Cold temperatures can help constrict blood vessels, reducing redness and puffiness.

Warm Compress:

Enhances Hydration: Using the pack warm can help enhance the absorption of lip balms or other lip care products, providing deeper hydration.

Promotes Relaxation: Warm application can be relaxing and comforting, especially during colder months.

Improves Circulation: Warmth can increase blood flow to the lips, which can help with overall lip health and appearance.

Convenience: The pack is usually small and portable, making it easy to use at home or on the go.

Reusable: Many lip ice hot cold packs are designed to be reusable, which makes them a sustainable and cost-effective option.

To use the lip ice hot cold pack, follow these steps:

For Cold Application:

1. Place the pack in the refrigerator for a few hours or until chilled.

2. Gently apply the cold pack to your lips for a few minutes at a time.

For Warm Application:

1. Place the pack in a bowl of warm water or use a microwave-safe pack and heat it briefly (follow the manufacturer's instructions).

2. Apply the warm pack to your lips for a few minutes at a time.

It's important to follow the manufacturer's instructions for the specific product you are using to ensure safe and effective use.