User blog comment:Gourgeist/Shingeki no Kyojin Chapter 66 Review: Wish/@comment-7418318-20150210234336/@comment-7418318-20150223223129

If nearness was the only problem he could have handed her the bottle and told her to drink, or filled some of the liquid into a different container for her to drink from.

But he was still standing right next to her and even touched her while she held the syringe to her arm, so I doubt he thought of getting far enough away.