Virtually BPA-free means that the parts are made of materials with negligible amounts of BPA (1% or less). Even though it is virtually BPA-free, BPA is not released unless the material gets hot. No part of our juicers gets hot enough to release BPA. We choose to be honest about this, while other brands don't address this and claim their materials are "100% BPA-Free" when it may not always be true.Refer to the Slowstar SW-2000 / SW-2020 user manual for more information.