Arrived in good time and packed perfectly. Good shipping rate (affordable even :). These are super Safety size sustainers and good for that purpose, so the wick doesn't swim and break the glass while burning. Will want to try different sizes. These are excellent for larger candles. However, for smaller candles, a lot of wax is lost at the end of the burn, so it's about safety versus fuel efficiency. mmhh. Love having them. Thank you!