how to open [SEP] looking at the design of the case this is in it looks like the smaller part of the top should open if it is suppose to open i cannot figure it out so i just unscrewed the entire top off to use it not really a big issuethe foundation itself is waterproof does last all day with no problemit is a nice smooth foundation easy to apply with the sponge that comes with thisit does cover up some of the skin flawsit is an okay foundation for a decent price kept my skin soft all daywas easy enough to wash off at the end of the day i would buy again