QuickLinks -- Click here to rapidly navigate through this document

Exhibit 25.1

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY UNDER
THE TRUST INDENTURE ACT OF 1939 OF A
CORPORATION DESIGNATED TO ACT AS TRUSTEE
Check if an Application to Determine Eligibility of
a Trustee Pursuant to Section 305(b)(2)

U.S. BANK NATIONAL ASSOCIATION
(Exact name of Trustee as specified in its charter)

31-0841368
I.R.S. Employer Identification No.

60 Livingston St. Paul, Minnesota (Address of principal executive offices)	55107 (Zip Code)
Richard Prokosch U.S. Bank National Association 60 Livingston Avenue St. Paul, MN 55107 (651) 495-3918 (Name, address and telephone number of agent for service)
Packaging Corporation of America (Issuer with respect to the Securities)
Delaware	36-4277050
(State or other jurisdiction of incorporation or organization)	(I.R.S.Employer Identification No.)
1900 West Field Court Lake Forest, Illinois (Address of Principal Executive Offices)	60045 (Zip Code)

4-3/8% Senior Notes Due 2008
5-3/4% Senior Notes Due 2013
(Title of the Indenture Securities)

FORM T-1

Item 1.	GENERAL INFORMATION.    Furnish the following information as to the Trustee.
	a)	Name and address of each examining or supervising authority to which it is subject.
			Comptroller of the Currency Washington, D.C.
	b)	Whether it is authorized to exercise corporate trust powers.
			Yes
Item 2.	AFFILIATIONS WITH OBLIGOR.    If the obligor is an affiliate of the Trustee, describe each such affiliation.
		None
Items 3-15	Items 3-15 are not applicable because to the best of the Trustee's knowledge, the obligor is not in default under any Indenture for which the Trustee acts as Trustee.
Item 16.	LIST OF EXHIBITS:    List below all exhibits filed as a part of this statement of eligibility and qualification.
	1.	A copy of the Articles of Association of the Trustee.*
	2.	A copy of the certificate of authority of the Trustee to commence business.*
	3.	A copy of the certificate of authority of the Trustee to exercise corporate trust powers.*
	4.	A copy of the existing bylaws of the Trustee.*
	5.	A copy of each Indenture referred to in Item 4. Not applicable.
	6.	The consent of the Trustee required by Section 321(b) of the Trust Indenture Act of 1939, attached as Exhibit 6.
	7.	Report of Condition of the Trustee as of June 30, 2003, published pursuant to law or the requirements of its supervising or examining authority, attached as Exhibit 7.

*

Incorporated by reference to Registration Number 333-67188.

2

NOTE

        The answers to this statement insofar as such answers relate to what persons have been underwriters for any securities of the obligors within three years prior to the date of filing this statement, or what persons are owners of 10% or more of the voting securities of the obligors, or affiliates, are based upon information furnished to the Trustee by the obligors. While the Trustee has no reason to doubt the accuracy of any such information, it cannot accept any responsibility therefor.

SIGNATURE

        Pursuant to the requirements of the Trust Indenture Act of 1939, as amended, the Trustee, U.S. BANK NATIONAL ASSOCIATION, a national banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility and qualification to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of St. Paul, State of Minnesota on the 2nd day of September, 2003.

U.S. BANK NATIONAL ASSOCIATION
By:	/s/  RICHARD PROKOSCH Richard Prokosch Vice President
By:	/s/  BENJAMIN J. KRUEGER Benjamin J. Krueger Trust Officer

3

Exhibit 6

CONSENT

        In accordance with Section 321(b) of the Trust Indenture Act of 1939, the undersigned, U.S. BANK NATIONAL ASSOCIATION hereby consents that reports of examination of the undersigned by Federal, State, Territorial or District authorities may be furnished by such authorities to the Securities and Exchange Commission upon its request therefor.

Dated: September 2, 2003

U.S. BANK NATIONAL ASSOCIATION
By:	/s/  RICHARD PROKOSCH Richard Prokosch Vice President
By:	/s/  BENJAMIN J. KRUEGER Benjamin J. Krueger Trust Officer

4

Exhibit 7
U.S. Bank National Association
Statement of Financial Condition
As of 6/30/2003

($000's)

			6/30/2003
Assets
	Cash and Due From Depository Institutions		$	11,987,100
	Federal Reserve Stock			0
	Securities			35,336,411
	Federal Funds			4,955,134
	Loans & Lease Financing Receivables			118,648,100
	Fixed Assets			1,864,465
	Intangible Assets			9,999,520
	Other Assets			8,735,830
		Total Assets	$	191,526,560
Liabilities
	Deposits		$	132,461,590
	Fed Funds			5,061,915
	Treasury Demand Notes			0
	Trading Liabilities			303,140
	Other Borrowed Money			20,320,775
	Acceptances			150,586
	Subordinated Notes and Debentures			6,326,523
	Other Liabilities			5,864,946
	Total Liabilities		$	170,489,475
Equity
	Minority Interest in Subsidiaries		$	999,216
	Common and Preferred Stock			18,200
	Surplus			11,015,123
	Undivided Profits			9,004,546
		Total Equity Capital	$	21,037,085
Total Liabilities and Equity Capital			$	191,526,560

To the best of the undersigned's determination, as of the date hereof, the above financial information is true and correct.

U.S. Bank National Association

By:	/s/  RICHARD PROKOSCH Vice President
Date: September 2, 2003

5

QuickLinks

Exhibit 25.1

FORM T-1
NOTE
SIGNATURE
CONSENT