We’ve seen this before and have actually asked people to return their bottle so we can check. It’s been frustrating because sometimes the bottle refuses to drip no matter how much we shake it. Other times it will drip a very small amount. So frankly, it’s a nuisance to us and we can’t guarantee that we can supply one that won’t drip a little.
If it’s any consolation, we have tested almost every portable bottle on the market and virtually all of them drip!