Sorry if wordy. First deal post. Tried my hardest!
Need to be a sleep points member (simply login to existing account or if new register on their website) for free shipping over $49 to apply.
Excludes bulky items (mattresses etc).
For deal stacking new members get $5 worth of sleep points you can redeem and apply to your order for a $5 discount.
If you are going to spend $75+ (and are a new member or have a new email address) you could use one of the sleepstore referral links (https://www.cheapies.nz/deals/thesleepstore.co.nz) to get $15 off your order code + $5 sleep point discount + free shipping over $49.
Having a quick play it looks like the $15 referral code can be used off the total of multibuy items even when discounted (I.e when the 10-20% off multibuy discount has also been already applied based on the original price).
For example in "feed multibuy" I manged to get an example item at $74.95 (1x https://www.thesleepstore.co.nz/brand/planetbox/planetbox-st…) + (3x https://www.thesleepstore.co.nz/brand/kai-carrier/single-reu…)
Down to ($43.56 delivered) with the free shipping, $15 referral and $5 sleep point redemption.
Configurations vary but have a play!
75 dollars for a lunch box?