Talk:Vacpack/@comment-37891988-20190312150157/@comment-38591790-20190312160525

You get the water to 100 with the rest of your storage space by upgrading your 7Zee rank to 20.

If you read the list, you'd see that the "Tank Booster Mk III" states it can hold 50 units, ergo, the "Tank Booster Ultra" can hold more than that, which is 100 units of stuff and water.