To save on plastic waste we now send our replacement heads without a cap. This way you can recycle your old cap meaning you can save on plastic waste. If you have misplaced your cap please click here purchase a replacement. Solar Buddies work with most sunscreens. We advise not to use oily or watery type sunscreens (e.g Sprays) as they can leak. For us conventional sunscreens from ‘squeezy’ bottles work best. Thicker creams can work but may need a little help getting to a roller ball.