Trivial question here: how do you open these bottles? Dh and I were both stumped last night. Took off the clear plastic seal and then tried to twist the top off, without success. Looking at the top more closely, it looked like it might be a pouring top (ie there appeared to be holes on either side), but nothing would come out. Were we just wimps without enough strength to twist off the top, or are we missing something obvious?!