What a great idea: if you need ice packs for lunch boxes, picnics and the like, you can use directly frozen food, e.g. frozen pudding :)
Links:
Tip: Edible ice packs
…compilation of tutorials
What a great idea: if you need ice packs for lunch boxes, picnics and the like, you can use directly frozen food, e.g. frozen pudding :)
Links:
Tip: Edible ice packs