Abstract: An improved bottle holder may include a supporting board, which has a screw hole configured to connect with a screw to secure the bottle holder on the bicycle, and a lower portion of the supporting board has a supporting piece connecting with an arc-shaped elastic portion on each of both sides of the supporting piece. A limited hole and a through hole partially overlapped with each other are formed on the supporting piece, and the size of the through hole is larger than that of the limited hole, and a protruding edge is formed at a connecting portion of the limited hole and the through hole on each side thereof.

Abstract: An improved bottle holder may include a supporting board, which has a screw hole configured to connect with a screw to secure the bottle holder on the bicycle, and a lower portion of the supporting board has a supporting piece connecting with an arc-shaped elastic portion on each of both sides of the supporting piece. A limited hole and a through hole partially overlapped with each other are formed on the supporting piece, and the size of the through hole is larger than that of the limited hole, and a protruding edge is formed at a connecting portion of the limited hole and the through hole on each side thereof.

Abstract: An adjustable structure of a bicycle water bottle rack includes a water bottle rack, an adjustable device and a string. The adjustable device is located at a front end of a first and a second clamping arms of the water bottle rack. One end of the string is fixed at a string collecting slot of an adjusting unit, and the string penetrates out from the string collecting slot and the connecting hole of the base, and is inserted into the through hole and a string slot of the first clamping arm, and disposed at the a string slot of the water bottle rack. Furthermore, the string passes through the second clamping arm and is fixed at the base. A receiving space between the first and second clamping arms can be adjusted, so that the water bottle rack can be used for water bottles with different sizes.