Design The Design Evolution of the Spyra One
The best water gun in the world should, of course, not only have awesome features, but also look cool! You can see the design development of the Spyra One below:

1st generation:
October 2018 – January 2019
2nd generation:
January 2019 – March 2019
3rd generation:
March 2019 – May 2019
4th generation:
May 2019 – June 2019