I wondered if the Boon elephant snack box does a good job of keeping food separate in each compartment. I am thinking of purchasing it for our future travel, but I want to be sure it doesn't get the food all mixed up. Also, does anyone own a skip hop lunch bag or the regular bag? Does the snack box fit laying flat? Do you have a favorite bento box with different compartments? Or a favorite toddler bag pack? Name and picture (or a website link) of the product will be much appreciated!