Once a business is incorporated, it is its own legal entity and needs to have its own pool of funds that is legally separate from the owners' funds.
There would be one or more accounts held in the name of Super Secret Labs LLC and in most cases that business account would have rules about who was allowed to approve the transfer of funds out of the account, and to what limit. In many cases it may require approval from 2 account holders.
Prior to incorporation, the call on funds would typically be much lower, so it's probably going to be a bit ad-hoc, and might just use an account held by one of the founders with everyone throwing their share when needed. If you can't trust your cofounder with $2k, then don't start a business with them.
There would be one or more accounts held in the name of Super Secret Labs LLC and in most cases that business account would have rules about who was allowed to approve the transfer of funds out of the account, and to what limit. In many cases it may require approval from 2 account holders.
Prior to incorporation, the call on funds would typically be much lower, so it's probably going to be a bit ad-hoc, and might just use an account held by one of the founders with everyone throwing their share when needed. If you can't trust your cofounder with $2k, then don't start a business with them.