How it works
Once your payment is confirmed, go to Purchases, open the order and choose to vault it.
Your next wins from the same seller join the same vaulted bundle.
When you're ready, go to Purchases, open the order and request shipping. The seller sends everything together.
Shipping cost
Shipping is based on the combined weight of your bundle, so it usually costs less than sending each order separately. If your bundle gets heavier, the shipping cost may go up a little. See Weight Based Shipping.
Good to know
Vault isn't available from every seller. If you don't see the option on your order, that seller doesn't offer Vault.
Vault works per seller, and each seller ships their own bundle.
A Vault stays open for up to 60 days. After that, it stops taking new orders and the seller ships your bundle.
If your parcel fills up and a new bundle starts, the new one isn't vaulted automatically. Vault it again if you want to keep holding your wins.