The PDFset includes:

• Fig. S1. Schematic and characterization of light-triggerable linker.
• Fig. S2. Mechanical and biocompatibility characterization of tough hydrogel platform.
• Fig. S3. Characterization of light-induced hydrogel degradation in vitro.
• Fig. S4. Synthesis of gastric-resident balloon sealed with light-degradable hydrogel.
• Fig. S5. In vitro characterization of gastric-resident balloon swelling.
• Fig. S6. In vitro mechanical characterization of gastric-resident balloon before and after degradation.
• Fig. S7. Custom-manufactured light-emitting devices for in vivo triggering of light-degradable hydrogels.
• Fig. S8. Synthesis and characterization of light-triggerable esophageal stent.

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Other Supplementary Material for this manuscript includes the following:

• Movie S1 (.mov format). Balloon swelling in gastric environment in vivo.
• Movie S2 (.avi format). Ferrofluid filled into a long S-RuM architecture.
• Movie S3 (.avi format). Demonstration of ingestible LED tethering to balloon in vivo.