I was highly upset when I misplaced my original Orange Sport Bottle from my Oster MyBlend while en route from classroom to classroom:( I use it faithfully for my a.m. shake! I was highly excited to order the Replacement Bottle on line and in a pretty Pink color! It arrived in a timely manner. To my disappointment, it did not fit the blending part :( Cap did not tighten all the way and the liquid would spill out. Returned bottle to the store with no problem. Went to the shelf and purchased the pretty blue one! Once again, it did not fit. Now I was highly disappointed. Persistent to replace the bottle, I proceeded to once again order the Orange one, in hopes it would fit. Well, this time I brought my blending piece with me to the store when I went to pick it up and tried it right at the counter before paying for it. I was so ecstatic with joy... IT FIT! :) NOW, I AM A HAPPY CAMPER, Perseverance paid off. Hope this helps someone out there. God bless and enjoy your Orange Replacement Bottle to your Oster MyBlend!