The 28mm Duet cap is used for the 330ml, 500ml and 750ml mineral bottles, a secure tamper evident bottle cap which is available in a variety of colours and can be applied easily by hand.

*Please note when adding the cap to the bottle. Put the cap over the bottle top push down, not too hard as the tamper evident seal will break, when the cap is on the screw thread of the bottle screw the cap on.