Rant !!

It's not pregnancy related but god I seriously am so freaken annoyed right now 
Does anyone know what to put out on your door or in your room so ants won't come in ? I swear these little shits are so annoying we can't leave anything without them coming and climbing on our food / drinks. We dont leave food or drinks out anymore but I hate how I leave my tea out and not even an hour or two later they are in it -.- I dont put sugar on it idk why the hell they would want tea for . 
& I would leave food on the top shelf and idk how the hell they get up there its so annoying 
We live in a little room in the back of my parents house I don't want to put poison because we have kittens but does anyone know of something you can put outside your door or something?