3D design and model for a Water Enhancer Bottle

I require a working 3D model of a bottle intended for a range of water enhancers by the name of Juus. The bottle is two part and divided into the "body" and "cap/lid" The body of the bottle must be able to house between 50-60ml of liquid. The filling will be done through the "neck" of the bottle as is the standard procedure. The neck must also have a locking mechanism where the cap sits and locks onto to make the bottle spill proof. The "press and click" mechanism is preferred instead of the "twist lock" as it is easier to implement for this particular product. This type of locking mechanism is very common and can be seen in many body wash bottles. That would be a good reference for this project. We prefer a "flip top" style for the cap/lid. In this style, the top lid is unlatched to reveal an opening which is used for serving. The size of the opening must be small to control the size of the serving OR it must have a housing for a silicone membrane to control the flow of the liquid. The latter style is preferred but is not mandatory. The lid will, of course, have a locking mechanism that complements the one on the neck to make it spill proof. "MiO" by Kraft foods implements a great working design of what we are trying to achieve and is an excellent reference for this project. I have attached some reference files and the general shape of the bottle that has been designed for our product. We would like to apply the aforementioned qualities in our design and make it into a working model. Slight changes in the general shape to accommodate these qualities are acceptable. Any creative changes in the bottle and the cap are also welcome. The slimmer the design, the better.