We have just started making these tanks and there are only two of us so supply will be limited for the time being. As they become available I will list them here. We will have a variety of options in the future including a mini size and different color tubes. The tanks are machined aluminum and polycarbonate tube. They come in your choice brushed finish or polished. The regular size holds approximately 5ml of juice and is easy to refill by removing the top and pouring in your juice. The price of the tanks is $40 the paypal fee is $2 and shipping is $2 first class $6 priority.