日(ひ)持(も)ちlength of time which food products will keep, to keep a long time

日持(ひも)ちのあるお菓子(かし)はお土産(みやげ)に最適(さいてき)だ。

Sweets that keep for a long time are perfect as souvenirs.

これは日持(ひも)ちしないから、早(はや)く食(た)べないと！

This doesn't keep long, so you have to eat it quickly!

切(き)り花(ばな)は、どうしても日持(ひも)ちが短(みじか)くなってしまいます。

Cut flowers inevitably have a short shelf life.

日持(ひも)ちのしない生(なま)菓子(がし)をどうして旅行(りょこう)前日(ぜんじつ)に買(か)ったのですか？！

Why did you buy fresh sweets that don't keep long the day before your trip?!

う〜ん…ケーキはやっぱり日持(ひも)ちしないから当日(とうじつ)に食(た)べるべきだよ。

Hmm... Cakes don't keep long, so you should eat them on the same day.