A tealight (also tea-light, tea lites or tea light, t-lite or tcandles), or nightlight, is a candle encased in a thin metal or plastic cup so that the candle can liquefy completely while lit. Tealight candles can be made by pouring or pressed. can be scented or unscented. the holder can be Aluminum cup, Plastic cup, Metal cup, etc. Can be Heart shape or Pressed with various pattern. Tealights derive their name from their use in teapot warmers, but are also used as food warmers in general.They are a popular choice for votive candles. They are also suitable for accent lighting and for heating scented oil. Tealights may be floated in water for decorative effect.