diff --git a/VERSION-HISTORY.md b/VERSION-HISTORY.md
index 341512b..146daaf 100644
--- a/VERSION-HISTORY.md
+++ b/VERSION-HISTORY.md
@@ -3,7 +3,8 @@ This file is a version history of blimpy amendments, beginning with version 2.0.
 <br>
 |    Date    | Version | Contents |
 | :--: | :--: | :-- |
-| 2022-07-20 | 2.1.1  | Mods to Waterfall class, an alternative to file loading (issue #264). |
+| 2022-07-22 | 2.1.2  | More container fields needed (issue #270). |
+| 2022-07-21 | 2.1.1  | New Waterfall class option, an alternative to file loading (issue #264). |
 | 2022-07-08 | 2.1.0  | New utility: dsamp (issue #267). |
 | 2022-04-19 | 2.0.40 | Fixed blimpy to show plots when the display supports it (issue #263). |
 | 2022-03-30 | 2.0.39 | examine_h5 in hdf_reader.py is loading too much data (issue #261). |
diff --git a/blimpy/waterfall.py b/blimpy/waterfall.py
index 88bd593..5514a75 100755
--- a/blimpy/waterfall.py
+++ b/blimpy/waterfall.py
@@ -82,11 +82,13 @@ def _init_alternate(self, header_dict, data, filename=None):
         self.file_size_bytes = 0
 
         # The Waterfall "container":
-        class Container():
+        from blimpy.io.base_reader import Reader
+        class Container(Reader):
             n_beams_in_file = 1
             n_pols_in_file = 1
             _d_type = np.float32
             t_begin = 0
+            t_start = 0
             freq_axis = 2
             time_axis = 0
             beam_axis = 1
@@ -102,6 +104,10 @@ class Container():
         self.container.f_start = self.container.f_begin
         self.container.f_stop = self.container.f_end
         self.container.t_end = data.shape[0]
+        self.container.t_stop = data.shape[0]
+        self.container.selection_shape = data.shape
+        self.container.n_ints_in_file = data.shape[0]
+        self.container.header = header_dict
 
         # Set Waterfall object properties.
         self.header = header_dict
diff --git a/setup.py b/setup.py
index 1851322..6c4136d 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 """
 from setuptools import setup, find_packages
 
-__version__ = '2.1.1'
+__version__ = '2.1.2'
 
 with open("README.md", "r") as fh:
     long_description = fh.read()
diff --git a/tests/data.py b/tests/data.py
index 214ec1a..463624b 100644
--- a/tests/data.py
+++ b/tests/data.py
@@ -8,3 +8,4 @@
 voyager_block1 = path.join(here, 'test_data/Voyager1_block1.npy')
 test_ifs_fil = path.join(here, 'test_data/test_ifs.fil')
 test_h5 = path.join(here, 'test_data/test.h5')
+test_fil = path.join(here, 'test_data/test.fil')
diff --git a/tests/test_waterfall2.py b/tests/test_waterfall2.py
index c968d86..323f881 100644
--- a/tests/test_waterfall2.py
+++ b/tests/test_waterfall2.py
@@ -2,7 +2,7 @@
 from astropy import units as u
 from astropy.coordinates import Angle
 import blimpy as bl
-from tests.data import voyager_h5
+from tests.data import voyager_h5, test_h5, test_fil
 
 def test_waterfall_stream_1():
 
@@ -41,6 +41,8 @@ def test_waterfall_stream_2():
     wf_voya1 = bl.Waterfall(voyager_h5)
     wf_voya2 = bl.Waterfall(header_dict=wf_voya1.header, data_array=wf_voya1.data)
     wf_voya2.info()
+    wf_voya2.write_to_hdf5(test_h5)
+    wf_voya2.write_to_fil(test_fil)
 
 
 if __name__ == "__main__":