The Daytrip 3. 1L Lunch Box is a classic-looking lunch bag boating Yeti's revolutionary insulation that offers hours-worth of ice-cooling power. Say goodbye to soggy sandwiches and lukewarm soda because this bag can keep your lunch refreshing from breakfast to afternoon. Yeti's new Thermo Snap magnetic closure actually snaps close for a tight seal that helps keep food cold longer. When the meal's over, the Daytrip 3. 1L Lunch Box folds down for smaller storage in backpacks.