Riku watched Sora with admiration. Sora was such a good older brother. He wished that he had a little brother as easy as Tsuna... then Sora might be proud of him too. But no, he just had Gokudera. He'd filled Gokudera's waterbottle himself because he knew his brother wouldn't do it himself, and then would have bitched the WHOLE way up the mountain.
"Lets get going, people," Riku said. "Sora and I have food in our packs if you get hungry. We're not stopping until we get to the top." He and Sora didn't know that Gokudera had spilled the beans aboout it being camping.
He waited until he was pretty sure Sora wasn't looking to switch their water bottles.