Hi there,We're very interested with this product but we have a few questions.1. Do you offer this type of bottle in 30ml or 50ml?2. What is the size of the OPENING of the bottle?3. Is the opening of the bottle airtight and liqunot leak during air transport?Thank you so much! Hoping for a speedy reply. Gabriel ArnadoIndustrial Use:rmaceuticalUse:PillMaterial:Glass