Nalgene also makes Bike Bottles .. I have one,
they included a folding cover to keep the cap from getting muddy spew off the front tire.
Blackburn Used to make one ..20+ years back... for the Quart Bottles
I talked to King Cage, a few Years ago..
They are willing to make a batch, & if the order is big enough
to cover setup costs Its a possibility,, start to be reasonable at about 2 dozen units for initial order.
said to send them a Nalgene Bottle to work around.