Description This product is made of environmental non-toxic material. It is made with wave design and is beautiful and more easier to use it. The seal ability of this product is good and can avoid it from leak. It also can hold up to 600ML of water. The insulation of product is good to enable longer preservation of cool temperature to keep the breastmilk for fresh. How to use? Open the lid Insert the water,Fill the with water until 3/4 full Put into the refrigerators Freeze it for 8-12 hour This product only need to fill in the water for the first use and after that it can be reusable. We suggest you to use with cooler bag so that u can get more good effect Material: External: HDPE environmentally friendly material Inside: polymer water-absorbent resin - coolant Need 8-12 hours to freeze it Capacity: 600ML(approx) Size(LWH): 21cm x 10cm x 5.2cm / 8.27in x 3.94in x 2.05in(approx) 2 Colors for choose:Blue/Hot pink Quantity: 1 pc Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes:(without retail package) 1 x Ice bag