Pack of 1 Glow In Dark Wacky String. Glow In The Dark Wacky String in a 87 gram can. Can contains 87g of glow in the dark silly string spray (glows best under black light). Perfect for a glow party, New Year's Eve event or a rave, spray this glowing wacky string around your party room for a great effect or buy a few to have a silly string fight with your friends! Keep spray at room temperature and out of reach of children, spray in the air at a distance of 3 metres away from children, clothing and furniture.