PROBLEM TO BE SOLVED: To facilitate the production of a bouquet, shorten the bouquet production time, do not make it bulky at the time of transportation, etc., and facilitate the disposal of a water retention device after a flower has withered. SOLUTION: A pair of rings 3, 4 extending in the circumferential direction is formed on the outer circumference of one paper cup 10, and a first through hole 21 is formed at the bottom of the other paper cup 20, and a peripheral edge of the first through hole 21 is formed. The extending first pleated portion 22 is formed, the one paper cup 10 is fitted into the first through hole 21 of the other paper cup 20, and the pair of rings 3, 4 of the one paper cup 10 is formed. The first pleated portion 22 of the other paper cup 20 was fitted. [Selection diagram] Fig. 4【課題】ブーケの製作を容易にし、ブーケ製作時間を短縮でき、搬送時などにかさばることがなく、花が枯れた後の保水装置の廃棄を容易にした。【解決手段】一の紙コップ１０の外周に周方向に延びる対のリング３、４を形成し、他の紙コップ２０の底部に第１貫通孔２１と、該第１貫通孔２１の周縁に延在する第１ひだ状部２２とを形成し、他の紙コップ２０の第１貫通孔２１に一の紙コップ１０を嵌めて、一の紙コップ１０の対のリング３、４の間に他の紙コップ２０の第１ひだ状部２２を嵌合させた。【選択図】図４
