This link lists the capacity @ 6ml, which seems more realistic.
Latest FOGGER V2 ,bottom coil rebuildable atomizer ,100% pure stainless steel ,kayfun GT or taifun atomizer, View Bottom coil rebuildble atomizer, YILOONG Product Details from Jiangmen Yiloong Industrial Co., Ltd. on Alibaba.com
Well if there is one thing Alibaba is consistent at, it's being inconsistent.