DRINKING STRAW

PROBLEM TO BE SOLVED: To provide a straw which can surely and sufficiently secure a function of making the inside of a package container communicate with the outside air, without reducing the effective opening area, when the straw is used by sticking into the package container.SOLUTION: On the outer peripheral surface of a drinking straw S (outer straw part 10) which is used by sticking into a package container H, there is formed a projected line 30 spirally extending from near the drinking opening part 11 toward the tip end side, in a manner projecting radially outward. When the drinking straw S is used by sticking into the package container, the spiral projected line 30 spreads out the inner periphery of the sticking hole of the package container H, forming a gap for communicating the inside of the package container H with the outside air, in the left and right respectively of the spiral projected line 30. In the process of sticking the drinking straw S into the package container H, the inner periphery of the sticking hole receives an action of expanding successively in the peripheral direction by the spiral projected line 30, so that the function of communicating the inside of the package container H with the outside air is further improved.SELECTED DRAWING: Figure 1 【課題】有効開口面積を小さくすることなく、包装容器に突き刺して使用される際に、包装容器内を外気に連通させる機能をより確実かつ十分に確保できるストローの提供。【解決手段】包装容器Ｈに突き刺して使用される飲用ストローＳ（外ストロー部１０）外周面に、径方向外方側に突出するようにして、飲み口部１１の近傍から先端側に向けて螺旋状に延びる凸条３０が形成されている。飲用ストローＳを包装容器に突き刺して使用する際に、螺旋状の凸条３０が包装容器Ｈの突き刺し孔の内周縁部を押し広げて、螺旋状の凸条３０の左右においてそれぞれ、包装容器Ｈ内を外気と連通させる隙間が形成される。飲用ストローＳを包装容器Ｈに突き刺していく過程において、突き刺し孔の内周縁部が、螺旋状の凸条３０によって周方向に順次拡径される作用を受けるので、包装容器Ｈ内を外気と連通させる機能がより向上される。【選択図】図１