Microwave safe.The warmth is delicious. Perfect for camping and outdoor activities. Heat in a 600W microwave for 2 minutes, 500W for 2 minutes and 30 seconds. If the ambient temperature is low and the warmth is not sufficient, please reheat it at a time of 10 seconds. When boiling water, stop the fire and warm the heat preservation. (500W) 2 minutes - 2 minutes 30 (600W) 1 minute - 2 minutes (1500W) Approx. 40 seconds, Firirki, Thermal Agent, Snow Pack, For Hot, Other Pack, 17.6 oz (500 g) Oriki Small Bag

Just chin in in the microwave for heat retention. Ideal for keeping warm during delivery and take-out at your lunch box, pizza, curry, etc. Just chin in in the microwave for heat retention. Perfect for camping and outdoor activities. You can also warm it with hot water. Reusable and economical. Note (Disclaimer) > Please read *Heating time may vary depending on the microwave used. If the heating time is wrong, the heating method may cause the bag to burst.

[How to use] Heat in a 600W microwave for 2 minutes, 500W for 2 minutes and 30 seconds. If the ambient temperature is low and warm is not enough, please reheat it at a time of 10 seconds. When boiling water, stop the fire and heat the heat preservation. Oriki Heat Preservation Agent Snow Pack, For Hot, Other Pack, 17.6 oz (500 g), Sold in Small Bag

You can use it as well! Other packs are really convenient for fermenting yeast bread. It is a must-have for fermenting especially during the winter season. Oriki Heat Preservation Agent, Snow Pack, For Hot, Other Packs, 17.6 oz (500 g), Sold in Small Bags, Thermal Agents, Other Packs, 17.6 oz (500 g), Just chin in in the microwave for heat retention. It can also be boiled with hot water. Reusable and economical. Perfect for lunch boxes and outdoor heat preservation. Weight: 17.6 oz (500 g); Temperature lasts approximately 4 hours after heating 5 minutes; Size: 6.3 x 9.1 inches (160 x 230 mm); Material: Carboxymethyl cellulose; *If the heating time and heating method is wrong, the bag may burst.