The indispensable ink tank also seems to have been reworked. New materials and an improved form factor have made the tank lighter and more durable. These Inklings sure have stepped up their tech in the last two years!
— Squid Research Lab
Source: Splatoon’s Tumblr.
…Wanna play? Buy a Switch.
And if you’ve already got yours, click on Splatoon 2 for everything you need to know about the game. 😀