I bought this product on the advice of the OralB customer service team. I have a Sonic Vitality and there is no travel case for it. My Vitality is not a perfect fit in that it doesn't click into place, but it is held snugly and securely and doesn't move in transit. That's enough for me! There are two slots for brushheads too. The plastic is durable. I think that if you overstretched the hinge it may snap but only with rough handling. I use it with appropriate care and it's pretty robust. Overall a fabulous product.