Summary

Also include Inventor file

Material I used - PLA - It is strong enough to open any bottle with 50% infill also, but 100% is better.

Print Settings

Printer:

Custom delta printer

                                            <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>100</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Cura 15.04.6 settings, Material - PLA, Layer height 0,2 mm, Shell thickness 0,4 mm, Bottom/Top thickness 1,0 mm, Fill density 100%, Print speed 100 mm/s</p></div>

How I Designed This

Comparison between first model

            <div><p>First model was designed quickly, so it needs some improvement.</p></div>                <p class="detail-image"><img src="https://cdn.thingiverse.com/assets/dc/e1/bc/48/75/DSC_0162.JPG"></p>                <p class="detail-image"><img src="https://cdn.thingiverse.com/assets/0f/09/ee/01/ef/DSC_0164.JPG"></p>

Keyring bottle opener