Abstract: A kit may include a syringe; and a mixing device. The syringe may have a barrel, a plunger, a tip, and a foamable therapeutic disposed in the barrel. The mixing device may have (A) a syringe body and a mixing tip fluidly coupled to an interior of the syringe body, and a plunger and spring disposed within the syringe body; (B) a mixing channel, a supply channel and a delivery channel; wherein one end of the mixing channel is coupled to the mixing tip and one end of the supply channel includes a connector for removably coupling to the syringe; (C) a three-way valve that is configured to selectively couple an opposite end of the mixing channel, an opposite end of the supply channel and the delivery channel to one or more of the other; and (D) a mixing element disposed in the mixing channel.