Chalkii Non Toxic Reversible Dry Neon Dual Tip Liquid Chalk Marker, Pack of 2 2 Multi Purpose Liquid Neon Chalk Markers Create, Erase And Re-Create. Easy To Use, Easy To Wipe, Easy To Reuse Non Toxic. Green Production. Safe To Use Reversible Tip! One Bullet Side (rounded) One Chisle Side (square) Perfect For Non-Porous Surfaces (chalkboards, plastics, metals, glass, ceramics)