This small heart is in fact an autonomous warmer which contains a translucent substance. Click the small piece of metal inside and the shock wave generates a chain reaction in the transparent liquid: The liquid crystallizes instantaneously under your eyes and releases a temperature of 130°C in 5 seconds! ideal to heat the hands or anything... Size 11 x 11cm x 2cm Warms to 130 °F in 5 seconds Stays warm for around 45 mins Recharges in minutes Re-use again and again Hundreds of practical and kinky uses Simpler than a bloke (and warmer)