Baby USB bottle

Features:
1, keep warm when eating
2, good insulation effect
3, safety voltage 5 v
4, every milk bottle can use it
5, comfortable to wear
?? specification:
Material: cotton, PC
Size: 6.5 m ?? 10 cm
Heating power: 5W
Power input: 5V / 1A
Note: 1. Due to manual measurements, please allow an error of 1-3 cm. Make sure they don't mind before bidding.
2. Due to the difference between different displays, the picture may not reflect the actual color of the item. Thank you!????