Bests & Worsts Reviews from Amazon

We purchased the Bento box, based on the good reviews on Amazon, and initially had a good experience with it. The concept is obviously sound (with centuries of testing!), although we were concerned by the apparent flimsy security of the insulated tub "rings" on one container (the little rubber inserts for insulation). The center "plug" fell out after a few weeks use, and would not stay securely inserted thereafter. We called the manufacturer, and were curtly advised that there was NO WARRANTY on the product whatsoever! We were invited to purchase replacement plugs for nearly $3 each, plus $3 shipping, which we did, begrudgingly. We filled out a customer service feedback form online, hoping that perhaps the lack of service provided by phone was an anomaly (It's not so much the additional expenditure that bothers me, as the company's complete unwillingness to stand behind their product. That's disconcerting, to say the least). UPDATE: The company just called and threatened legal action based on the above review...!? Way to go, customer service! I am leaving 2 stars for the product, but the company behind it gets zero stars. Purchase at your own peril, and in the knowledge that you are paying mor ethan $40 for something that will likely break, and has no warranty for anything but the large outer casing.