Our set of six (6) stainless steel funnels are made to fit all ofthe bottles sold by Eclectic Supply that are 4 ounce capacity orsmaller. They are perfect for portioning your essential oils intosmaller containers without all the spills. Additionally, thesefunnels are made to fit into most types of drinking flasks - pleasecheck yours to ensure that the opening is at least 9.5mm wide. Aswith any product, please wash before use.<br>