- We have four types of food grade safe packets: paper packets, aiwa packets, special packets, and non-woven fabric packets.  All packetspassed the US FDA 21 CFR 176.170 compliance test, which means that it is safe to be in direct contact with food.   Paper packets are rechargeable via oven and microwave, but you can't visually see the color change when the beads are saturated.  Aiwa packets are semi-transparent and contain few orange indicating beads for you to know when the beads are saturated.  Aiwa packets has its own method of reactivation.   - We also launched special food safe packets in larger size packets: 20, 50, 100 and 500 gram. Special packets are rechargeable via oven and microwave.