Keeping cool: chilly pad vs kool tie

we were planning on taking our frogtogg chilly pads with us to WDW to help keep us cool but alas, we took them out of camping storage to find them covered in mold, ew! our fault for not drying them all the way i guess. we were planning on getting new ones until i discovered kafka’s kool ties. they work well and are a bit less bulky even when ‘activated’ but i worry about how they would hold up during travel. i’m afraid too much pressure or jostling in a backpack would cause it to burst. anyone have any experience traveling with these or opinions on which you think is better?

No experience but bumping this for you for other liners who may know.