Thank you sir! I cut the top of a bottle I had but I couldn’t fit my udders in there! I found a bigger bottle and twisted my boob in there. I was nervous but I attached the vacuum and with as little thought as possible, switched it onto High power. It hurt like hell. My fat sack was squished into the bottle and my nipple was left shaking in the pulling power of the vacuum. It nearly filled till the very top! It hurt a lot. Thank you for your order sir