美国采购需求：30ml玻璃滴管瓶，化妆品包装玻璃精华液瓶，精油玻璃滴管瓶，方形滴管瓶，精油瓶

We are looking for 30 mL custom glass serum dropper bottles along with matching printed boxes. The bottles should be square-shaped, made of glass, and feature a dropper closure. Please confirm if we can customize the glass color, as we are considering both clear and frosted options. We want to incorporate our logo using screen printing or other methods on both the bottles and the packaging. Additionally, the custom boxes should be designed specifically for the 30 mL bottles, allowing for a range of branding options like color choices, embossing, and different finishes. Please provide details on your ISO certifications, along with the minimum order quantities and lead times for both the bottles and packaging. We'd also like to request samples to evaluate quality before placing a larger order. Note that we won't require any filling services, as the bottles will be sent to our formula manufacturer for filling.