Is the insert removable for cleaning ?
On the Ronjo Ultimate Milk Vanish Tumbler is the insert removable for cleaning ?
Also, is the insert a custom molded hard plastic piece or is it just a disposable Solo cup ? (because, honestly, if that's all it is , I can -- and have -- made that kind of thing for myself. What I'm looking for is something sturdier and professionally crafted not just a DIY job . Being able to remove the insert for cleaning is also something I would look for in this kind of prop.)