"Bottle Rocket" Protective Koozie sleeve for kids' water bottles (Parametric)

prusaprinters

Tired of your kids breaking, denting, scratching, or dinging their water bottles, causing you to buy new ones every month?Well, my brilliant 3.5 year old son had a really cool idea for protecting his nice stainless steel bottle from dents and scratches: What if it was a rocket ship?!So, I decided to make this TPU sleeve, which has detachable fins that slide into it.(You can also use your slicer's text feature to add text to the bottle and personalize it)Printing Tips:The fins are best printed standing on the point, with tree supports, so there's minimal supports to cut away (TPU is tough like that). Use a lot of perimeters (like, 8 or 9 on a 0.4mm nozzle), so that the TPU is firm enough to actually support the weight of a full bottle. A high shore hardness TPU such as 98A is fine. I haven't tested it with softer ones.Remember, with TPU, high-heat and slow printing are your friends. The fins MIGHT break when dropped if your print isn't perfect or you had 1 layer of under-extrusion, but fortunately, they're easy to replace… and they're designed to be kind of “sacrificial” in order to protect the bottle. The bottle holder itself probably should be printed with 1 perimeter (of 0.6mm) and “octogram spiral” infill. You can do 2 perimeters, but then it will be pretty rigid and quite hard to remove, should you need to.. so if you want to do 2 perimeters of 0.4mm, I suggest scaling it up a tiny bit (or using the parametric model)It's currently scaled for the YETI Jr. bottle, but this model is fully parametric, and if you want, you can change the variables of the bottle diameter and height by going to this link: https://cad.onshape.com/documents/bbeb346a09808fff2792a4f4/w/29e8796137488ca611496dda/e/fdde0ef2ee53283c13120934?renderMode=0&uiState=66976383286ffb74974e4912  All credit for this idea goes to my little boy, Ari.