In my parish, the shrine of the Blessed Mother icon is framed by many receptacles for small candles. The wick’d wax of choice is tea lights our volunteer team (a mother and daughter) acquires from Hobby Lobby for us.
A number of years ago, my friend Sue Dean told me her secret for preventing difficult clean-up jobs on candle holders: a little vegetable spray. The metal-enclosed mini-candles also help, but sometimes there is molten flow of wax. If we used the larger votive candles, some kind of no-stick treatment would be required.