Pop-up drink bottle Campus 275ml press and drink. That's what the smart pop-up drink bottle from Rosti Mepal is all about. By simply pressing the button it opens and it closes again by pressing the spout, it's as easy as that. This handy pop-up bottle has a handy clip with which you can attach it to a belt or bag. This will save your bag from getting wet if a few little drops should happen to escape from the spout after drinking. This drink bottle is perfect for taking to school, sports or swimming lessons.