Feature: 1. Leak Proof: This hot water bottle adopts one piece forming process, which has good airtightness, explosion proof and water leakage prevention, and is safer to use. 2. Multi Purpose: Inject 3/4 of cold water and put into the refrigerate for more than 30 minutes, it can become an "ice water bag" and can be used for cold compress. 3. Heatable: After filling the hot water bottle with cold water, it can be heated in a microwave oven without releasing BPA, which is non toxic and harmless. 4. High Quality Material: The hot water bottle body is made of high quality silicone material, which is comfortable to the hand, safe and non toxic, strong and durable. 5. Portable: Small and portable size design, you can take the hot water bottle to the office or go out to use, can also be used in the bed, to provide you with warmth in cold weather. Specification: Item Type: Hot Water Bottle Material: Silicone + Knit Hot Water Bottle Size: Approx. 16 x 10cm / 6.3 x 3.9in Knit Cover Size: Approx. 12 x 22cm / 4.7 x 8.7in Weight: Approx. 214g/7.5oz Capacity: Approx. 550ml. Package List: 1 x Hot Water Bottle1 x Knit Cover Note: Manual measurement, please allow 0.4‑0.7in error.