The build-a-box option makes it easy to stock up on just the gels I actually want, and the box discount applied automatically at checkout. The flavourless version goes down smooth without that sticky sweet aftertaste.
Took a few boxes to land on the right flavour from the dropdown, but the discount auto-applied at checkout just as described—no faffing with codes. The gels are easy to carry and the neutral taste means no sickly sweetness mid-run.
The discount kicks in automatically when you mix flavours into the box, which made stocking up for race season way easier than I expected. Gels are plain as advertised, so no weird aftertaste lingering on long runs.