... : Non-toxic, non-flammable, non-radioactive, waterproof, windproof.6. Usage : concert, dance hall, Halloween, party, promotions, special events, festival, celebration, giveaway, carnivals,bars, nightclubs. foam ... 1 inch glow sticks drop/glow in the dark stick/party supplies ( Non-toxic, non-flammable, non-radioactive)