- The bins and faucets are made of AISI 304 stainless steel, which is food-safe and highly corrosion-resistant.
- BOROUX Foundation™ Black filters are blocks of activated carbon.
- The Stem Saver (holder for the BOROUX Foundation™ Black filters) and the locking plugs are made of BPA-free, food-safe plastic.
- The sealing rings are made of silicone.