This timeline is an amazing resource, I love it. I've stumbled across the following tour poster from Australia, but can't place it. Not sure if anyone here has any clues.
I imagine it was from 1997. Research I've done indicates Blink did Warped Tour Australia in 1997 (though I can't confirm we even had a leg of the Warped Tour in 97). General consensus is that Apple Shampoo was released as a single in Australia in 1997 in support of their stint on Warped. The "Apple Shampoo Tour" that the poster is advertising may well have been some sideshows to the Warped Tour, or was perhaps a mini-tour a but later in 1997.
I asked the manager of the support band, The Living End, but she cannot recall specifics other than that there may have been a small tour later on during 1997.
Cheers!