By making a Bitcoin deposit to Bottlepay, the transaction has been transmitted to the Bitcoin network but has not yet become part of the blockchain. The transaction must be verified and included into a valid block through a process called Bitcoin Mining.
On average, each block takes approximately 10 minutes to be mined. With each subsequent block mined, the number of confirmations increases. The higher the number of confirmations the more final a transaction is deemed.
For security reasons incoming transactions will say 'pending' and require 3 confirmations.
After 3 confirmations your deposit will be credited and available immediately.