She wasn't the only one incapable of engaging in a social interaction appropriate. Nishi went out of his way to avoid them most of the time because he didn't care to engage with others. With that being said, he carelessly tossed the tube in her direction to catch whether she was prepared for the toss ot not.

"Then get a new one." His tone was as abrasive as his personality. Obviously he didn't make very many friends. Surely she won't get too upset over his lack of friendliness.