You can put ice inside of the iten and cool it down.
Daiso

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.8 inch
Height : 0.5 inch
Length : 6 inch

Item Weight: 0.32 ounce (View shipping rates and policies)
Shipping Weight: 0.32 ounce (View shipping rates and policies)

ASIN : B00KR88YJE