Using these white cup candle holders is a breeze. Just place your preferred flameless candle inside the holder, and you're all set to enjoy a warm, inviting glow in your spa. When choosing a candle, pick the size and color that match your spa's decor to create the perfect ambiance. As for maintenance, you can simply toss them in the machine for a quick and easy clean. This will keep them looking pristine for years. Be sure to use only flameless candles to avoid any fire hazards. Also, don't expose the holders to extreme temperatures as it might affect their quality.