"I'm in love with this Klean Kanteen Insulated TKCanister ($35). It's a 32-ounce leakproof container, so it's been awesome for packing large portions of cut up fruit, big salads, overnight oats, and even nice cream when I go on day trips with the family. It keeps everything cold and fresh and works up to 45 hours, so even fruit that I packed the day before has been cold the next morning — it's amazing! I'm also excited to use it in the fall and winter, since it keeps food hot for 11 hours. Another essential feature is that it's dishwasher-safe!" — JS