argon 18 spare e-119 tri+ top tube / bento box

Many toptube bento boxes are too small for the nutrition needs of a full Ironman. Athletes need to find a solution, so they often place this extra nutrition outside of the bento box – often simply taped to the frame - leading to an aero penalty. The Argon 18 integrated bento box solves this problem by including a reservoir within the toptube. Specifically designed for full IM nutrition needs, the integrated bento box significantly increases the capacity over the previous model, from 288ml (previous-generation E-119) to 405ml (E-119 Tri+ Disc). The bento box can be removed and cleaned as needed, and the box is closed, with only a few small vents to allow for rain or sweat to drain. This means there is no risk of any of the contents falling into and getting lost in the frame.