吉他（意大利语：Chitarra），又译为结他或六弦琴。是一种弹拨乐器，通常有六条弦，形状与提琴相似。吉他在流行音乐、摇滚音乐、蓝调、民歌、佛朗明哥中，常被视为主要乐器。而在古典音乐的领域里，吉他常以独奏或二重奏的型式演出；当然，在室内乐和管弦乐中，吉他亦扮演着相当程度的陪衬角色。

古典吉他与小提琴、钢琴并列为世界著名三大乐器。

Logo and packaging design for “17.5°”, a new series of Orange and Apple juice products intended for the China market, produced by “Nongfu Spring”, the leader in food and beverages of China.

The Design Solution
“17.5°” is used to describe the ideal RSS (Ratio of Sweet and Sour) in client’s orange and apple juices. We used a simple, bold, equal - width typography in order to better imprint and aesthetically ‘stabilise’ in the mind of the viewer the product name “17.5°”. The ideal balance conveyed by the RSS ratio pronounced with this number is extended to the balance of letters and the overall form. The Semi circle visualises the 0.5 part of this numeric index and ingredients proportion. If the name “17.5°” is triggering consumers' curiosity through abstraction and toward easy recollection, the design attempts to reinforce the process with the body and weight of a dominating logo. Clear pet material is used for the container so that the natural juice cover serves as the backdrop of the product name.