Retainer giữ nắp bình Grayl Water Bottle Cap Retainer

I lost the top to my GRAYL UltraPress 16.9 oz Water Purifier & Filter Bottle, so I designed a replacement that had a retainer so I wouldn't loose it a second time. It can be found at:

https://www.printables.com/model/1193234-grayl-water-bottle-top-v2

But I then realized that some people might just want the retainer for use with their existing caps. So I designed this Retainer that presses down over the existing Cap. I printed it in TPU so it is flexible. No supports are required.

To use, simply tread the retainer on the spout and then flex the retaining strip to screw the cap on.

Please post your Likes & Makes if you like the design. Thanks!