。
Semen is worth bottling.
Literal
Semen [topic-は] bottle [obj-に] doing [gen-の] value [subj-が] exist [emph-よ].
A short, provocative one-liner. 瓶詰めにする '(to) put into a bottle / bottle up' uses the にする pattern (literally 'make X into Y'). 価値がある '(there is) value in X / X is worth X-ing' is the stock evaluative construction. The final よ is an assertive tag. Very short — a provocative remark made in an unspecified context.