Almost all bike bottles of big brands come without covers for the bottle nozzle.
When riding the nozzle is covered with sand and dust, and sometimes it's so muddy you can barely drink. So I decided to create my own cover.
Step 1: Materials and Tools:
Bottle of soft drink
Rubber strip (Rubber thread)
Needle and thread
it's very simple. just cut the head of the soft drink bottle as shown in pictures. then,cut 2 pieces of rubber strip and by needle and thread make them rings which suitable to the cut bottle head and your bike bottle diameter. Stitch with wide thread (such as shoestring) the 2 rings by needle and thread and everything is ready.