All our bubbles are filled with Bubble Juice to the top. However, during transit, they could leak due to handling, freeze during winter, and evaporate due to heat. We have found that this happens very rarely but on the occasion, they do we recommend you refill the bottles with a soapy (detergent) water solution. It will work as well as our genuine bubble juice. Since this is a problem experienced by all wholesalers we will not be able to accept claims for credit or replacement of bubble bottles that are not totally full. Thank you for your understanding.