You will need 2 flower pots that you will cover with a bit of duct tape at the bottom.

Then, you will add the sand in between the 2 pots and wet the sand.

DIY Flower Pot Cooler - DIY Refrigerator - Emergency Food Storage - Prepping Ideas

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Easy Way To Cool Food - DIY Flower Pot Refrigerator - Cooler Hacks

DIY Flower Pot Cooler - DIY Refrigerator - Emergency Food Storage - Prepping Ideas