Instruct: Classify an Amazon review as either positive or negative.
Query: NOT LEAK PROOF

IF I HAVE TO TRY TO CLEAN PRUNE JUICE OUT OF THE CARPET ONE MORE TIME..WHICH I WON'T BECAUSE I AM PUTTING THIS THERMOS IN THE GARBAGE. LOVED IT IN THE BEGINNING BECAUSE MY DAUGHTER COULD OPEN THE TOP AND USE IT HERSELF, BUT OVER THE PAST FEW WEEKS IT HAS STARTED LEAKING WHEN LEFT ON ITS SIDE ON THE GROUND--AS CHILDREN TEND TO LEAVE THINGS. IF YOU TIGHTEN THE TOP TOO MUCH IT MAKES A GAP AT THE STRAW AND LEAKS FROM THERE AND IF YOU DON'T TIGHTEN IT ENOUGH IT LEAKS. I HAVE TRIED EVERYTHING AND AM TIRED OF FINDING IT ON ITS SIDE SOMEWHERE WITH A HUGE PUDDLE UNDERNEATH IT.